tìm và sửa lỗi sai:

1. If we run of oil, we need other kind of energy

2. If pollution will increase, more and more trees wil die

3. I usually feel worriedly before an exam

4. They are certain that they can help us cleaning up the beach

5. I am disappointed that they did not tell us how doing it

6. He couldn't meet you because of he was busy

7. She went to bed early because her sickness

8. The pupils were divided in small groups

9. Unless she doesn't take the Japanese course, he can't work with them

Write the second sentences so that it has the same meaning as the first one:

1. He can't this suicase because he is very old

He can't .................................

2. He broke the vase because he was careless

He broke ..............................

3. He doesn't have money. He can't buy a new bicycle

If he ................................

4. She was hungry so she had big lunch

She had...............................................

5. All the shops were shut because it was a public day

It was ............................................