Bài 4. Hoàn thành các câu sau, cho dạng đúng của động từ trong ngoặc.

1. We (be) ____________ happy if air pollution were the only problem.

2. They would be disappointed if you (not go) _____________ to their party.

3. If we (use) _______ this kind of light bulb, we can save energy.

4. Peter should go to sleep early if he (not want) ____________ to be tired the next morning.

5. If you (take) _______________ more exercises, you would be more resistant to diseases.

6. You may have car accident unless you (drive) ________________ more carefully.

7. If I travel to London, I (visit)  ____________ its museum.

8. If they offer me the job, I think I (accept) _________________ it.

9. Many people (be) ____________ out of work if the local factory closed down.

10. What (happen) _________________ if that red button was pressed?

11. I’d be absolutely astonished if Mary and James (get) _____________ married.

12. They won’t let you in unless you (show) _____________them your identity card.

13. My best friend gave me this book. She (be) ________________ very upset if I lost it.

14. Would you mind if I (turn) ________________ up the radio.

15. I’m sure she (forgive) ______________ you if you sincerely apologize to her.

Bài 5. Đánh dấu ütrước câu đúng, đánh dấu x trước câu sai và viết lại cho đúng.

______ 1. Pollution can be reduced if we joined hands to prevent it.

______ 2. If farmers would make use of pesticide more wisely, the soil would not be poisoned.

______ 3. I won’t believe it unless you showed me the evidence.

_____ 4. Unless you don’t tell me the truth, I won’t help you.

_____ 5. If James is more outgoing, he would have more friends.

_____ 6. I think the show would be successful if he were one of the organizers.

______ 7. If you paid more attention to what I said, you didn’t make so many mistakes.

______ 8. If children are taught about environmental issues, they might change their attitudes towards pollution.

______ 9. You would be punished if you park your car here.

_____ 10. If you could win the competition, we will have a celebration.