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1. The trains couldn’t run because of the snow.
=> The snow prevented the trains from running
2. I didn’t arrive in time to see her.
=> I wasn’t early enough to see her
3. I’m sorry I was rude to you yesterday.
=> I apologize for being rude to you yesterday
4. He didn’t hurry, so he missed the train.
=> If he had hurried, he wouldn't have missed the train
5. Janet is the best tennis- player in the club.
=> No one in the club plays tennis as well as Janet
6. I haven’t seen that man here before.
=> It’s the first time I have seen that man here
7. The furniture was so expensive that I didn’t buy it.
=> The furniture was too expensive for me to buy
8. The robbers made the bank manager hand over the money.
=> The bank manager was made to hand over the money by the robbers
9. He learned to drive when he was 18.
=> He has learned to drive since he was 18
10. She had never been unhappy before.
=> She was unhappier than she had been before
11. It was so late that nothing could be done.
=> It was too late for something to be done
12. I asked the hotel porter to wake me at 8 o’clock the following morning.
=> “Please wake me up at 8 o'clock next morning" I told the hotel porter
13. They’ll have to change the date of the meeting again.
=> The date will have to be changed again
14. The garage is going to repair the car for us next week.
=> We are going to have the garage repair the car next week
15. The bus takes longer than the train.
=> The train doesn't take as long as the bus
16. John has not had his hair cut for over six months.
=> It’s six months since John last had his hair cut
17. Maria says she’ll like to have been put in a high class.
=> Maria wishes she would have been put in a high class
18. Would you like me to finish the work tonight?
=> I’ll finish the work tonight if you like
19. You may get hungry on the train, so take some sandwiches.
=> In case you get hungry you’d better take some sandwiches.
20. My husband didn’t leave the car keys, so I couldn’t pick him up at the station.
=> If my husband had left the car leys, we could have picked him up at the station
ko ngờ trong tiếng anh nhiều ngữ pháp ghê
hok thuộc ko đc cô ạ
*Không chắc lắm,lớp 9 hơi căng.
1. Is this the first time you have been to London ?
2. We have not gone to Spain for three years.
3. The old house on the plateau that we visited was magnificent.
4. In spite of the heavy traffic, Ba went to school on time.
7. In spite of being ill, she went to school.
8. The man whom I spoke to last night comes from Australia.
10. Viet Nam, which export rice to other countries, is in Asia.
5. Despite my mother's age, she still works hard.
6. Despite taking the first train, she went to the meeting late.
9. Nguyen Du, who wrote the story of Kieu, was a famous poet.
The match lasts ninety minutes
-> It take -place within ninety minutes----------------------------
These shose're both beautiful and affordable - I can't make ______________ mind
A.in
B.on
C.up
D.with
* Chọn C , make up mind : quyết định
These shose're both beautiful and affordable - I can't make mind
A.in
B.on
C.up
D.with
*Đây là chương trình lớp 9,mình chưa nắm rõ nên có gì sai sót bạn b.ỏ qua cho mình nhé.
1 When Mark arrived, the Johnsons was having dinner, but they stopped in order to talk to him
2 That is the third cake you have eaten this morning
3 All the food served in this restaurant was excellent.
4 The United Nations play important part in preserving peace for the world.
5 . The test was so difficult that none of us could do it successfully.
6 Either you or your brother will be choose tomorrow.
7 Both Tom and Mary make mistake yesterday.
8 The police was here for security yesterday.
9 Never have Maria seen such a beautiful house.
10 Neither you nor I was here last night.
In the old days, families with two brothers had to live separately because their father died early and his brother was married.
The greedy husband and wife, who won all their possessions on the grounds of taking care of the fire for their father. They only divided me into a small piece of land with a star tree planted. The brother is gentle and diligent, taking care of the tree every day. On the day of harvest, my brother was very sad because a strange flock of birds came to eat most of the sweet stars he had planted. Sitting in a pillow, tears welled up in tears because of her humorous fate, her brother heard the voice from the star: "We are not ordinary birds." Contract to pay for gold. Stitch three cast iron bags, take with you.
During the appointment, early the next morning, the Spirit Bird calmed him and flew off to an offshore island. There are no shadows on the island, no signs of life, only gold and jewels. Honestly, my brother followed the Spirit Bird's advice. The bird took him home with a bag of gold and silver tapes to live his whole life.
My life has changed. still working hard, adding wealth to me, soon, my brother became the richest in the region. The brother used to find the source.
After hearing me tell the story, my brother offered to exchange for luck to get a small piece of fruit with stars. The brother also met and was promised a payment by the Spirit Bird after crying and crying. Greed, listening to his wife's instincts, his brother made three sacks, each of which was seven castles, contrary to Spirit Bird's advice. On the way back, because of the heavy wealth, Spirit Bird asked his brother to give up but because of greed and regret, he did not listen. The result is tired birds, their wings and greedy people falling into the sea with wealth.
Greed and ruthless with flesh and blood are tragic. A good story, leaving us with a valuable lesson in life, is "Greed"
1 the salary of a professor is higher than that of a secretary -> the salary of a secretary is .......a secretary is lower than that of a professor......
2 he felt very miserable , so he looked for someone to share his life with -> he looked ...............for someone to share his life with because he felt very miserable..............
3 i didn't realize how late it was and i didn't stop studying till after midnight ->i didn't realize how late it was and i went.........on studying till after midnight............
4 when did you start working on the project ? -> how long ............ have you been working on the project ?..........?
Tổng số hạt trong M2X là 140, ta có:
\(\Rightarrow2\left[2P\left(M\right)+N\left(M\right)\right]+2P\left(X\right)+N\left(X\right)=140\)
\(\Leftrightarrow4P\left(M\right)+2P\left(X\right)+2N\left(M\right)+N\left(X\right)=140\) (1)
Số hạt mang điện nhiều hơn không mang điện là 44:
\(\Rightarrow4P\left(M\right)+2P\left(X\right)-\left[2N\left(M\right)+N\left(X\right)\right]=44\) (2)
Số khối của M{+} nhiều hơn X{2-} là 23:
\(\Rightarrow P\left(M\right)+N\left(M\right)-\left[P\left(X\right)+N\left(X\right)\right]=23\)
\(\Leftrightarrow P\left(M\right)-P\left(X\right)+N\left(M\right)-N\left(X\right)=23\) (3)
Tổng số hạt trong M{+} nhiều hơn trong X{2-} là 31:
\(\Rightarrow2P\left(M\right)+N\left(M\right)-1-\left[2P\left(X\right)+N\left(X\right)+2\right]=31\)
\(\Leftrightarrow2\left[P\left(M\right)-P\left(X\right)\right]+N\left(M\right)-N\left(X\right)=31\) (4)
Lấy (1) + (2) , ta có:
\(\Rightarrow8P\left(M\right)+4P\left(X\right)=184\) (5)
Lấy (4) - (3), ta có:
\(\Rightarrow P\left(M\right)-P\left(X\right)=11\) (6)
Từ 5; 6 \(\Rightarrow\orbr{\begin{cases}P\left(M\right)=9\\P\left(X\right)=8\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}M\text{ là }Kali\left(K\right)\\X\text{ là }Oxi\left(O\right)\end{cases}}\)
\(\Rightarrow M_2X\text{ là }K_2O\)
Số hạt mang điện trong hợp chất là (140+44)/2=92(hạt);
Số hạt mang điện trong M là (92-22)/2=35(hạt);
Số hạt mang điện trong X là (35+22)=57(hạt);
Nữa -.-
haha