1. Do I have to fill in any forms?

-> Is it necessary for me to fill in any form?

2. I cannot find out the truth because I don’t hear the two of them talking.

3. It is necessary that I post this letter tonight.

-> I need to post this letter tonight

4.This food is so good that I’m going to have some more.

-> This is such as a good food that I'm going to have some more

5. “Please don’t smoke in the house.” she said to us.

 ->She requested us not to smoke in the house.

6. “Why don’t you mention the problem now?” I asked them.

-> I asked them why had not you mention the problem before

7. You are unfit because you don’t do enough exercise.

-> If you weren't unfit , you would have do more exercise

mình còn câu 2 nữa thoi ạ sorry

`text{1. Is it necessary for me to fill in any form?}`

`text{2. If I don’t hear the two of them talking, I won't find out the truth}`

`text{3. I need to post this letter tonight}`

`text{4. This is such as a good food that I'm going to have some more}`

`text{5. She requested us not to smoke in the house}`

`text{6. I asked them why had not you mention the problem before}`

`text{7. If you weren't unfit , you would have do more exercise}`