for/prepare/americans/christmas/of/a/things/lot
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3 tháng 1 2016
She talking to is the vegetables the market .
Tick nha!!!!!!!!!!!!!!!!!!!
DH
0
KY
3 tháng 8 2021
mik đang cần gấp thi ak
20. You/ have never heard about teleportation, don’t you?
A B C D
21. When do English people prepare for Christmas? – They buy a lot of
A B Cdecorations, food and drink.
D
22. She was so exciting to see the new science fiction movie.
A B C D
C - READING
Read the following paragraph and complete it with one suitable word in each blank.
Sometimes it is necessary to (23) _____ our habits. Saving energy is one illustration. If we can (24) _____ more energy, such as water and electricity, we can help keep the natural environment safe. Saving water, for example, helps preserve our rivers and reservoirs. If we usually take 10-minute showers, in this case we should try to take shorter showers. When we go out, we (25) _____ remember to shut off electronic devices such as televisions and computers. Turning (26) _____ the lights is another example of saving electricity. In short, remembering to help the environment, such as by saving energy, is one of our most (27) _____ responsibilities.
23. A. exchange B. turn C. change D. make
24. A. help B. cut C. saving D. save
25. A. must B. may C. had D. should
26. A. on B. in C. without D. off
27. A. important B. basic C. necessary D. main
Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions.
Smoking causes lung cancer, which is the number one cancer among men. Ninety percent of the people who get lung cancer die. Smoking is also the leading cause of mouth cancer, tongue cancer, and throat cancer. Many smokers have heart disease arid pneumonia. Smoking causes one million early deaths in the world every year.
Smokers not only harm themselves but also harm others. Smokers breathe smoke out into the air. They breathe it out on their children and their wives or husbands. Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non- smokers.
We are all aware that smoking is bad. So why do people smoke?
28. The number one cancer among men is _________.
A. tongue cancer B. throat cancer C. lung cancer D. mouth cancer
29. The main cause of mouth cancer, tongue cancer and throat cancer is _________.
A. drinking B. overeating C. breathing D. smoking
30. Every year, smoking causes about one million _________.
A. cancer patients B. killing diseases C. early deaths D. injured men
31. The word “it” in the passage refers to _________.
A. cancer B. smoke C. air D. breath
32. Who are more likely to have lung cancer and lung problems?
A. People who live in the city. B. People who live with smokers.
C. People who live with non-smokers. D. People who live in the country.
2D
1
15 tháng 10 2021
Bài 2:
Áp dụng tính chất của dãy tỉ số bằng nhau,ta được
\(\dfrac{a}{2}=\dfrac{b}{3}=\dfrac{c}{4}=\dfrac{a+b+c}{2+3+4}=\dfrac{45}{9}=5\)
Do đó: a=10; b=15;c=20
25 tháng 2 2021
ờ...tớ ko nhầm thì thừa are
nếu bỏ are thì she's making a papper boat
DA
1
19 tháng 8 2021
\(2S=3^{31}-1=3^{28}.3^3-1=\left(...1\right).27-1=\left(.....7\right)-1=\left(...6\right)\)
\(\Rightarrow S=\left(...3\right)\)
Tận cùng bằng 3 nhé e
19 tháng 8 2021
3^0 có tận cùng là 1.
3^1 có tận cùng là 3.
3^2 có tận cùng là 9.
3^3 có tận cùng là 7.
3^4 có tận cùng là 1.
................................
3S = ( 3^1+3^2+3^3+......+3^31 )
3S-S = ( 3^1+3^2+3^3+......+3^31 ) - ( 3^0+3^1+3^2+......+3^30 )
2S = 2^31-1
2^31 có tận cùng là 1. ( theo như công thức đã nêu trên )
=> 2S có tận cùng là 0.
2S-S = 2S : 2
=> S có tận cùng là 5 vì ....0 : 2 bằng 5.
American/prepare/a/lot/of/things/for/Chiristmas.
American prepare a lot of things for Christmas.
Đây bạn nhé chúc bạn học tốt !!