Đáp án:

1. Game mustn't be played!

2. Your homework must be done at one!

3. They were told the truth.

4. The meal should be prepared before I get home.

5. My computer mustn't be used!

6. She has never been seen before.

7. A lot of money was earned last year.

Giải thích:

- Cấu trúc bị động của câu mệnh lệnh:

+ Chủ động: $V+O!$

+ Bị động: $S+must/should (+not)+be +VpII!$

1. Don't play game 

Game shouldn't be played!

2. do your homework at one 

Your homework should be done at one

3. I told them the truth

They were told the truth

The truth was told to them

4 Prepar the meal  before I get home 

The meal should be prepared before I got home

5 don't use my computer

My computer shouldn't be used.

6. I have never seen her before 

She have never been seen before.

7 He earned a lot of money last year 

A lot of money was earned last year