2.Every astronaut has to experience some training which is really hard.

3.John's mother who has 6 grand chilren lives in Scotland.

4.An old man whom we met told us that he had seen.

Ex5

1.More computers will be bought by schools in the future.

2.This company has been seen by my uncle for a long time.(có một số từ mình nhìn không rõ nên có thể viết sai,bạn thông cảm nhé)

2. Every astronauts have to try to do difficult training.

3. John's mother has 6 grand children and she lives in Scotland.

4. An old man we met told us we used to meet.

Ex5.

1. Computers will be bought in the future.

2. This company has been seen by my uncle for a long time.