Question 1: Write the correct forms and tenses
1. It is essential that he (come).............before seven.
2. I (consider).................buying a house but now I (change)...............my mind
3. I (hope).................. to meet you ever since I read your first novel.
4. I'd better (go)........................to the bank last Friday.
5. Were I (know)........................the truth, I would tell you about it.
1. He has just sold his old car. -> His.............................
2. If you followed my advice, you would be rich. -> Were you.................................
3. '' Don' t swim out too far, boys'' I said. -> I waened.............................
4. As soon as they arrived on the beach, it started to rain. -> No sooner.....................................
5. The dentist will have to take out the infected tooth. -> The infected tooth..................................
Rewrite
1. I hope to see you at Christmas.-> I am....................................
2. Your hair is too long, You'd better have it cut.-> Your hair.................................
3. Are you against working on sunday?-> Do you object.......................................
4. I have to writes 6 letter a day.-> There are.................................
5. You are not permitted to smoke in the hall.-> Smoking......................................
6. I wish I had gone on holiday with my friend.-> I regret.......................................
7. Tom's father no longer smokes cigarettes.-> No....................................................
8. People did not discover Aids until 1981.-> Not until...............................................
9. I seldom come there at night.-> Seldom.......................................................
10. We have never seen such a wonderful sight before.-> Never.........................................................
11. Those students arrived late because they had an accident.-> Because of............................................
12. Tom was worried because of the heavy traffic.-> Because the
13. I regret not fishing my home work at the weekend.-> I wish.................................
14. Ba ate too much and then felt sick.-> If
1.a) Oxi hóa hoàn toàn 1 lượng Al bằng khí 02. Sau pư khối lượng Al tăng lên 4,8 g. Tính mAl ban đầu.
b) Oxi hóa hoàn toàn 7.8 g h.hợp gồm Mg và Al thu được 14.2 g 2 oxit. Tính % khối lượng mỗi kim loại ban đầu.
2.Đem phân hủy 5.8 g Mg(OH)2 đến khối lượng không đổi thi khối lượng chất rắn giảm đi 1.8g. Biết quá trình phân hủy tạo thành oxit tương ứng và nước. Tính khối lượng chất rắn sau khi nung.
I. Rewrite
1. I will let you keep my bicycle till the weekend providing that you lock after it. ->If you..................
2. I'll tell you what happend so long as you don't tell anyone. ->If............................................
3. If you don't start working hard now, you won't be able to pass the final test. ->Unless you start working hard now,..................
II. Rewrite
1. Monica's English is very fluent although she makes quite a lot of mistakes. ->Monica speaks English.......................................
2. The film's ending is dramatic. ->The film ends...................................................
3. He approaches thoughtfully to his work. ->He has a thoughtful...........................
4. My brother is very good at playing tennis. ->My brother plays....................................