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I/ CHOOSE THE BEST ANSWER
1. i haven't eaten anything since i ...... home from football practice
a. have got b. had gotten c. got d. will get
2. dr. lam ............ about the life time of sharks for many year and ....... some awards so far
a. have studied/ had gotten b. had studied/ had gotten
c. has studied/ has gotten d. studied/ will get
3. a large hydroelectric ...... was built on the river Danube
a. power b. dam c. bank d. wall
4. water can be held on the land by vegetation
a. plants used as food b. grown trees c. the growth of plants d. plants and trees
5. .......... air makes people unpleasant to breathe
a. pollute b. pollution c. polluted d. polluting
6. we are now facing the possible ........ of several rare spceies
a. danger b. variety c. existence d. dissappearance
7. of the six people in the plan when it crashed only one......
a. existed b. lived c. hurt d. survived
8. the cattle drank from a river polluted with toxic chemicals
a. waste b. colorless c. odorless d. poisonous
9. the charity is totally dependent .... money from the public
a. from b. in c. upon d. with
10. when the wastes are poured into the atmosphere the air becomes contaminated and unpleasant to breathe
a. dense b. dirty c. upon d. with
11. they were sent to a local ........ right after theirr parent's death
a. orphanage b. hospital c. park d. prison
12. cuc phuong national park is ......... 160km south west of hanoi
a. lied b. established c. abandoned d. located
13. nearly 1000 of the world's bird species are ........ with extinction
a. threatened b. endangered c. protected d. abandoned
14. many people come to the nation parks to see the work being done to protect endangered species
a. plants or animals that may be dangerous to people
b. plants or animals that disappeared form the world
c. plants or animals that are about to die
d. plants or animals that may soon become extinct
15. rare species of plants or ........ can be found in this region
a. fauna b. flora c. flowers d. vegetation
16. the hydroelectric plant provides electricity for half the island's population
a. using hydrogen to produce electricity
b. using radiating energy to produce electricity
c. using water power to produce electricity
d. using tidal power to produce electricity
17. the whale is a(n) .............species, there must be laws to protect them or they will be extinct
a. endanger b. dangerous c. endangered d. endangering
18. if someone........you, say' thank you" to him
a. helps b. helped c. will help d. would help
19. ............. you, i would think twice about that deccision. it could be a bad move
a. if i am b. should i be. c. were i d. if i had been
20. if i weren't working for an electrical company, i ......... in the post office
a. work b. will work c. have worked d. would be working
21. why are you sitting in the dark. let's just sa that if i ..... my electricity bill last month. I.... in the dark now
a. paid/ wouldn't be b. paid/ won't be c. had paid/ wouldn't have been d. had paid/wouldn't be
22. why did tom keep making jokes about me? i don't enjoy .........
a. be laughed at b. to be lauged at c. laughing at d. being lauged at
23. if the world's tropical forest continue to disappear at their present rate. many animal species.....
a. became b. would have become c. will become d. would become
24. ....... resigned, we would have been forced to sack him
a. had he not b. hadn't be c. he had not d. he not had
25. i won't lend you this money..... you promise to pay it back
a. in case b. if c. otherwise d. unless
26. if you ......... us about the bad service, we'd have eaten there
a. didn't tell b. wouldn;t have told c. hadn't told d. had told
27. diana is a wonderfull ballet dancer. she ........ since she was four
a. would be dancing b. has been danced c. has danced d. was danced
28. if he ..... with us last weekend, he............ the beauty of the national park
a. were/ would enjoy b. was/ would be enjoying c. had been/ would enjoy d. had been/ would have enjoyed
29 . that part of the nation park ......... several times this year
a. is repaired b. has repaired c. repaired d. has been repaired
II/ choose the words or phrases that best complete this passage
cuc phuong, the first national park in viet nam was officially open in 1960. it (1).........160km south of west of hanoi spainning ninh binh , hoa binh and thanh hoa province. cuc phuong national park (2)............over 200 spare km of rainforest. it attracks (3)....... tourists and scientists. in 2002, nearly 100000 visitors made their way to cuc phuong. tourists come there to study butterfies, visit caves, hike mountain and look at the (4) ..... tree. many come to see the work done to protect (5)....... species. according, to scientists, there about 2000 different species of (6) ....... and 450 species of fauna in the park
1. a. locates b. located c. is located d. is locating
2. a . covers b. contains c. abandons d. controls
3. a. neither b. either c. both d. every
4. a . 1000- year-old b. 1000- years- old c. 1000 year old d. 1000 years
5. a. dangerous b. wild c. rare d. endangered
6. a. trees b. flora c. vegetation d. flowers
Pick out the word which has the underlined and bold part pronounced differently from the rest: (1m)
1. A. here B.cheer C. atmosphere D. where
2. A. teach B.much C. school D. choice
3. A. called B. organized C. happened D. filled ???
4. A. about B. bench C. but D. comb
II.Choose the best answer: (5.5 ms)
5. Whales are the most intelligent …………that has ever lived on Earth.
A. animal B. plant C. fish D. tree
6. Deforestation is destroying large areas of tropical rain forest.
A. changing B. raising C. becoming D. damaging
7. Many sea animals are at..........................due to hunting and water pollution.
A. loss B. death C. risk D. danger
8.We………………..use herbicides, pesticides and fertilizers that harm the environment
A. should not B. should
C. will D. does not
9. A: I don’t know how to use this camera?
B: It's quite easy. ……........... you
A. I going to show
B. I'll show C. I’m will show D. I’m going to show
10.The animals are not kept in …………..they can live in their natural environment A. cages B. house C. hotel D. restaurant
11. If you ………… to me, you wouldn’t have got so much trouble.
A. listened B. would listen C. had listened D. would have listened
12. There is a large …………….. of animals that live in Nairobi National Park. A. varied B. vary C. variety D. various
13. My home village is …………….. 40 kilometres north of the capital. A. held B. surrounded C. laid D. located
14. Would you like………………………. lunch with us? ”.
B: “Yes I’d love to”.
A. have B. to have C. having D. had
15.If you don’t know how to spell a word, you ……… look it up in the dictionary. A. must B. will C. should D. ought
16. These flowers are fresh. They .................... from the garden
A. have been just picked B. have just been picked C. have been picked just D. just have been picked
17. You .............. go to bed late. It’s not good for your health.
A. mustn’t B. should C. shouldn’t D. oughtn’t
18. Linda: Excuse me. Where’s the post office? Maria: ……………….
A. It’s over there B. I’m afraid not. C. Don’t worry. D. Yes, I think so.
19. I think you ................study hard for the next exam.
A. could B. will C. would D. should
20.The life ......... of sperm whale can be up to seventy years.
A. distance B. period C. length D. span
21.If Lan had worn a rain coat, she ............... a cold A. had got B. wouldn’t get C. won’t get D. wouldn’t have got
22. The child’s arm was swollen because he ……………….. by a bee. A. stung B. had stung C. had being stung D. had been stung
23. Some plants and animals are ________ organisms because they are extremely small. A. huge B. tiny C. big D. oversized
24. By the end of last summer, the farmers .............all the crop. A. harvested B. had harvested C. harvest D. are harvested
25. What would Tom do if he ______ the truth? A. would know B. has known C. know D. knew
26. Sperm whales prefer the waters with high ________ populations, which are their main diet. A. turtle B. squid C. shark D. sea lion
III. Choose the underlined part that needs correcting. (1.25 ms)
27.My parents(A) often take careful(B) =>care of me when(C) I am ill(D).
28. Many(A) people think(B) this novel(C) ửiting=>is written (D) by Ngo Tat To
29.Children(A) shouldn’t to =>bỏ spend(B) too much(C) time playing(D) computer game..
30. A new(A) law(B) has passed(C)=>has been passed to protect(D) the national parks.
31. Many new roads is(A) =>are being built(B) in this city(C) at the moment(D
TEST 1
I/ CHOOSE THE BEST ANSWER
1/ the last time I ..... in Athens, the weather was hot and humid
a. had been b. was c. am d. will have been
2. since i left my hometown, i .... to visit my friends and family several times
a. had returned b. have returned c. returned d. will have returned
1. haft the world's rain forests have already been ....
a/ endangered b. eroded c. found d. destroyed
2/ try to eliminate fatty foods from your diet
a. limit b. get rid of c. move d. add
3. acid rain has caused severe... on the hillside
a. erosion b. pollution c. destruction d. floods
5. this channel allows rainwater to run off
a. keep inside b. move around c. flow into d. flow out of
6. scientists are nơ researching new meansures to prevent... levels from rising
a/ pollute b. polluted c. polluting d. pollution
7. this park is the orphanage where lots of orphaned and abandoned animals are taken care of
a. looked after b. involved in c. dealt with d. moved in
8. new laws have been passed to ... wildlife in this area
a. establish b. conserve c. produce d. endanger
9. they were seeking a solution to the ... of the rain forests
a. destroy b. destroying c. destroyer d. destruction
10........ ken didn't have a ticket he was allowed to come in
a. although b.because of c. because d. in spite of
11. most most species in this forest are threatended with .....
a. appearance b. protection c. extinction d. destruction
12. we really ought to make a start on campaigns to ... our polluted rivers and seas
a. clean up b. clear away c. wipe out d. tidy up
15. the turtle has a long life.....
a. age b. span c. expectancy d. b and C
16. thy water is so contaminated that it is not suitable for drinking
a. toxic b. salty c. dangerous d. polluted
17. without plants, water would... .... as soon as it falls
a. run out b. run off c. run of d. run away
20. he's really delighted with his new CD player
a. pleased b. angry c. entertained d. annoyed
21. will you see tom at lunch today ? i'd like you to give him a message. i'm not going to lunch, but if i ..... him later, I.......him your message
a. should see/ will see b. see/give c. saw/ would d. could see/ will give
22, " john moved the big table alone" did he ? if he ..... me , I .... him
a. asked/ would help b. asked/ might have helped c. had asked/ could help
d. had asked / would have helped
23. what a beautiful dress you're wearing
- thank you, it.... especially for me by a French tailor
a. makes b. has made c. made d. was made
24. last night a tornado swept through Rockville. It..... everything in its path
a. was destroy b. was being destroyed c. destroyed d. had been destroyed
25. in some areas water...... from the ground faster than nature can replenish the supply
a. is being taken b. has been taking c. is taking d. has taken
26. an announcement about the eight o'clock flight to Chicago.......
a. has been already made b. has already made c. has already been made d. already made
27. .......during the storm
a. they were collapsed the fence b. the fence was collapsed c. they collapsed the fence d. the fence collapsed
28. the new computer system.........next month
a. is being install by people b. is be installed
c. will be installed d. is been installed
29. today many serious childhood diseases.....by early immuization
a. are preventing b. can prevent c. prevent d. can be prevented
30. it would have been a much more serious accident ..... fast at the time
a. was she driving b. she had driven c. had she been driving d. if she drove
31. we can't go along here because the road.........
a. is repairing b. is being repaired c. have been repaired d. has repaired
TEST 1
I/ CHOOSE THE BEST ANSWER
1/ the last time I ..... in Athens, the weather was hot and humid
a. had been b. was c. am d. will have been
2. since i left my hometown, i .... to visit my friends and family several times
a. had returned b. have returned c. returned d. will have returned
1. haft the world's rain forests have already been ....
a/ endangered b. eroded c. found d. destroyed
2/ try to eliminate fatty foods from your diet
a. limit b. get rid of c. move d. add
3. acid rain has caused severe... on the hillside
a. erosion b. pollution c. destruction d. floods
5. this channel allows rainwater to run off
a. keep inside b. move around c. flow into d. flow out of
6. scientists are nơ researching new meansures to prevent... levels from rising
a/ pollute b. polluted c. polluting d. pollution
7. this park is the orphanage where lots of orphaned and abandoned animals are taken care of
a. looked after b. involved in c. dealt with d. moved in
8. new laws have been passed to ... wildlife in this area
a. establish b. conserve c. produce d. endanger
9. they were seeking a solution to the ... of the rain forests
a. destroy b. destroying c. destroyer d. destruction
10........ ken didn't have a ticket he was allowed to come in
a. although b.because of c. because d. in spite of
11. most most species in this forest are threatended with .....
a. appearance b. protection c. extinction d. destruction
12. we really ought to make a start on campaigns to ... our polluted rivers and seas
a. clean up b. clear away c. wipe out d. tidy up
15. the turtle has a long life.....
a. age b. span c. expectancy d. b and C
16. thy water is so contaminated that it is not suitable for drinking
a. toxic b. salty c. dangerous d. polluted
17. without plants, water would... .... as soon as it falls
a. run out b. run off c. run of d. run away
20. he's really delighted with his new CD player
a. pleased b. angry c. entertained d. annoyed
21. will you see tom at lunch today ? i'd like you to give him a message. i'm not going to lunch, but if i ..... him later, I.......him your message
a. should see/ will see b. see/give c. saw/ would d. could see/ will give
22, " john moved the big table alone" did he ? if he ..... me , I .... him
a. asked/ would help b. asked/ might have helped c. had asked/ could help
d. had asked / would have helped
23. what a beautiful dress you're wearing
- thank you, it.... especially for me by a French tailor
a. makes b. has made c. made d. was made
24. last night a tornado swept through Rockville. It..... everything in its path
a. was destroy b. was being destroyed c. destroyed d. had been destroyed
25. in some areas water...... from the ground faster than nature can replenish the supply
a. is being taken b. has been taking c. is taking d. has taken
26. an announcement about the eight o'clock flight to Chicago.......
a. has been already made b. has already made c. has already been made d. already made
27. .......during the storm
a. they were collapsed the fence b. the fence was collapsed c. they collapsed the fence d. the fence collapsed
28. the new computer system.........next month
a. is being install by people b. is be installed
c. will be installed d. is been installed
29. today many serious childhood diseases.....by early immuization
a. are preventing b. can prevent c. prevent d. can be prevented
30. it would have been a much more serious accident ..... fast at the time
a. was she driving b. she had driven c. had she been driving d. if she drove
31. we can't go along here because the road.........
a. is repairing b. is being repaired c. have been repaired d. has repaired
II/ rewrite the following sentences
1. pay more attention or you won't understand what these people are saying
-> If you don't pay more attention, you won't understand what these people are saying.
2. i have just read one of my most favourite novels
-> One of my most favourite novels has just been read.
3. Alan's knowledge of art hasn't impressed me
-> I haven't been impressed by Alan's knowledge of art.
4. the pollution in the city was affecting people's breathing
-> People's breathing was being affected by the pollution in the city.
5. they are going to steal your money if you're not careful
-> Your money will be stolen if you're not careful.
7. mary really wants to buy the book, but she doesn't have enough money
-> Were Mary to have enough money, she would buy the book.
8. we believe that he has special knowledge which may be useful to the police
-> He is believed to have special knowladge which may be useful to the police.
-> It is believed that he has a special knowledge which maybe useful to the police.
9. lan is going to take a monthly test next tuesday
-> A monthly test is going to be taken by Lan next Tuesday.
10. my father makes me spell this word properly
-> I am made to spell this word properly by my father.
11. all his friend will see him off at the airport
-> He will be seen off at the airport by all his friends.
12. without helen's help, I couldn't have finished the work on time
-> If helen hadn't helped me, I couldn't have finished the work on time.
-> If it hadn't been for Helen's help, I couldn't have finished the work on time.
I. Choose one word or phrase - a, b, c or d - that best completes the sentence or substitutes for the underlined word or phrase
1____________ is a chemical used for killing weeds.
A. Pesticide
B. Herbicide< thuốc diệt cỏ>
C. Fertilizer D. Antibiotic
2. Sperm whale population are at risk due to hunting.
A. in extinction
B. in danger < in danger = at risk = in ruin : đang bị đe dọa, đang bị nguy hiểm>
C. on the decrease D. in fewness
3. What would Tom do if he ______ the truth?
A. would know B. has know C. knows
D. knew < câu đk loại 2>
4. _____________ you, I would think twice about that decision. It could be a bad move.
A. If I am B. Should I be
C. Were I < nhìn phía sau ta thấy : would think" rồi theo nghĩa câu ta biết đc là câu đk loại 2.
Were + S + O , S+ would/ could/ might ... + V(bare ) + O
or : Were + S + to V, S + would/ could + V<bare> + O
=> Đảo ngữ câu đk loại 2
D. If I had been
5. An announcement about the eight o'clock flight to Chicago ________.
A. has been already made B. has already made
C. has already been made D. already made
6. Many reliable methods of storing information ___________when computers arrived.
A. tend forgotten B. tend to forget
C. tend to be forgotten D. tend being forgotten
7. He would never do anything to _______ the lives of his children.
A. danger B. endanger (verb) C. endangered D. dangerous
8. Whales and sharks are carnivores, _______ means they eat meat.
A. this B. that C. it D. which
9. Mary's children are used to ____ after school every day. They don't have to walk home.
A. picking up B. being picked up < tobe + used to + being + V_pp -> bị động> C. be picked up D. pick up
10. Diaz is a wonderful ballet dancer. She ______ since she was four.
A. had been dancing B. has been danced C. has danced D. was danced
11. Up to now, AIDS have not been _______, and more and more people died of the disease.
A. treated B. concerned C. killed D. stopped
12. She is a famous _______. She is very interested in protecting wild animals from extinction.
A. conserve B. conservationist ( n -> chỉ người )
Ở chỗ chấm chấm cần 1 Noun chỉ người vì S là "she"
C. conservation D. Conservational
13. A: I don't know how to use this camera?
B: It's quite easy. ................. you
A. I going to show B. I'll show < đây là 1 quyết định tức thời> C. I'm will show D. I'm going to show
14. We....................use herbicides, pesticides and fertilizers that harm the environment
A. should not B. should C. will D. does not
15. The animals are not kept in .............., they can live in their natural environment
A. cages B. house C. hotel D. restaurant
16. The English class ..................................by a lot of students and teachers tomorrow
A. will be attended B. will attend C. attended D. will attended
17: These flowers are fresh. They .................... from the garden
A. have been just picked B. have just been picked
C. have been picked just D. just have been picked
18: You .............. go to bed late. It's not good for your health.
A. mustn't B. should C. shouldn't < câu khuyên ko nên đi ngủ muộn vì nó ko tốt cho sức khỏe>
D. oughtn't
19. I think you ................study hard for the next exam.
A. could B. will C. would D. should < nên hok hành chăm chỉ cho kì thi tới>
20. The life ......... of sperm whale can be up to seventy years.
A. distance B. period C. length D. span < life span : tuổi thọ , vòng đời ( đối vs sinh vật ) >
21. Without plants, most of water would ............................as soon as it falls.
A. run off B. run after C. run away D. run by
22. I still can't believe it! My bicycle................ last night.
A. was stealing B. stolen C. was stolen D. stole
23 It rained all the time, ................was a great pity.
A. that B. what C. which D. who
24. Water can be held on the land by vegetation.
A. plants used as food B. grown tree
C. plants and trees D. the growth of plants
25. The farmer removed some undeveloped trees to improve the growth of the rest.
A. planted B. watered C. eliminated D. fertilized
Chọn đáp án đúng:
1. I_________ in Can Tho for 18 years, but now I'm living in Ho Chi Minh city.
A. Have lived B. live C. lived D. have been living
2. I wondered why he_________ his job.
A. Has changed B. changes C. used to change D. had changed
3. The department store__________ by the Johnson for many years.
A. Has been run B. is run C. runs D. has run
4. Kate________ 10 comedies this summer.
A. Has watched B. had watched C. will have watched D. watched
5. The number of footballers________ for the last ten years.
A. Has increased B. was increasing C. have increased D. were increasing
6. Don't worry! We_______for you at 6 o'clock tomorrow.
A.Will wait B. will be waiting C. wait D. are waiting
7. Mary__________the country by the time this letter reaches her.
A. Is going to leave B. will leave C. is leaving D. will have left
8. By this time next year, my father________here for 25 years.
A. Are going to work B. will be working C. will have been working D. will work
9. Tim_________in three movies already. I think he'll be a star some day.
A. Had appeared B. has appeared C. was appearing D. is appearing
10. They_________the door. No one can get in now.
A. Have locked B. had locked C. locked D. lock
11. The existence of many stars in the sky__________ us to suspect that there may be life on another planet.
A. Have led B. leads C. lead D. leading
12. They___________ the town hall for the past three years in fact, but they it yet.
A. Built/ hadn't finished B. had built/ didn't finish
C. have been building/ haven't finished D. have built/ weren't finishing
13. When I met Jim, he__________ from his university already.
A. Graduated B. has graduated C. had graduated D. was graduating
I/ CHOOSE THE BEST ANSWER
1. i haven't eaten anything since i ...... home from football practice
a. have got b. had gotten c. got d. will get
2. dr. lam ............ about the life time of sharks for many year and ....... some awards so far
a. have studied/ had gotten b. had studied/ had gotten
c. has studied/ has gotten d. studied/ will get
3. a large hydroelectric ...... was built on the river Danube
a. power b. dam c. bank d. wall
4. water can be held on the land by vegetation
a. plants used as food b. grown trees c. the growth of plants d. plants and trees
5. .......... air makes people unpleasant to breathe
a. pollute b. pollution c. polluted d. polluting
6. we are now facing the possible ........ of several rare spceies
a. danger b. variety c. existence d. dissappearance
7. of the six people in the plan when it crashed only one......
a. existed b. lived c. hurt d. survived
8. the cattle drank from a river polluted with toxic chemicals
a. waste b. colorless c. odorless d. poisonous
9. the charity is totally dependent .... money from the public
a. from b. in c. upon d. with
10. when the wastes are poured into the atmosphere the air becomes contaminated and unpleasant to breathe
a. dense b. dirty c. upon d. with
11. they were sent to a local ........ right after theirr parent's death
a. orphanage b. hospital c. park d. prison
12. cuc phuong national park is ......... 160km south west of hanoi
a. lied b. established c. abandoned d. located
13. nearly 1000 of the world's bird species are ........ with extinction
a. threatened b. endangered c. protected d. abandoned
14. many people come to the nation parks to see the work being done to protect endangered species
a. plants or animals that may be dangerous to people
b. plants or animals that disappeared form the world
c. plants or animals that are about to die
d. plants or animals that may soon become extinct
15. rare species of plants or ........ can be found in this region
a. fauna b. flora c. flowers d. vegetation
#cont
16. the hydroelectric plant provides electricity for half the island's population
a. using hydrogen to produce electricity
b. using radiating energy to produce electricity
c. using water power to produce electricity
d. using tidal power to produce electricity
17. the whale is a(n) .............species, there must be laws to protect them or they will be extinct
a. endanger b. dangerous c. endangered d. endangering
18. if someone........you, say' thank you" to him
a. helps b. helped c. will help d. would help
19. ............. you, i would think twice about that deccision. it could be a bad move
a. if i am b. should i be. c. were i d. if i had been
20. if i weren't working for an electrical company, i ......... in the post office
a. work b. will work c. have worked d. would be working
21. why are you sitting in the dark. let's just sa that if i ..... my electricity bill last month. I.... in the dark now
a. paid/ wouldn't be b. paid/ won't be c. had paid/ wouldn't have been d. had paid/wouldn't be
22. why did tom keep making jokes about me? i don't enjoy .........
a. be laughed at b. to be lauged at c. laughing at d. being lauged at
23. if the world's tropical forest continue to disappear at their present rate. many animal species...
a. became b. would have become c. will become d. would become
24. ....... resigned, we would have been forced to sack him
a. had he not b. hadn't be c. he had not d. he not had
25. i won't lend you this money..... you promise to pay it back
a. in case b. if c. otherwise d. unless
26. if you ......... us about the bad service, we'd have eaten there
a. didn't tell b. wouldn;t have told c. hadn't told d. had told
27. diana is a wonderfull ballet dancer. she ........ since she was four
a. would be dancing b. has been danced c. has danced d. was danced
28. if he ..... with us last weekend, he............ the beauty of the national park
a. were/ would enjoy b. was/ would be enjoying c. had been/ would enjoy d. had been/ would have enjoyed
29 . that part of the nation park ......... several times this year
a. is repaired b. has repaired c. repaired d. has been repaired
II/ choose the words or phrases that best complete this passage
cuc phuong, the first national park in viet nam was officially open in 1960. it (1).........160km south of west of hanoi spainning ninh binh , hoa binh and thanh hoa province. cuc phuong national park (2)............over 200 spare km of rainforest. it attracks (3)....... tourists and scientists. in 2002, nearly 100000 visitors made their way to cuc phuong. tourists come there to study butterfies, visit caves, hike mountain and look at the (4) ..... tree. many come to see the work done to protect (5)....... species. according, to scientists, there about 2000 different species of (6) ....... and 450 species of fauna in the park
1. a. locates b. located c. is located d. is locating
2. a . covers b. contains c. abandons d. controls
3. a. neither b. either c. both d. every
4. a . 1000- year-old b. 1000- years- old c. 1000 year old d. 1000 years
5. a. dangerous b. wild c. rare d. endangered
6. a. trees b. flora c. vegetation d. flowers