1.      Phong doesn't have enough money so he can't travel abroad. If……………………………………………………………………………...…………..…… 2.      I don't drive too close to the animals on safari. They don't get scared. If……………………………………………….………………………...…………..………… 3.      Tom doesn't have a passport. He can't travel abroad. If……………………………………………………………………………………..……...…… 4.      I didn't buy it because I didn't have enough money. I ………………………………………………………………..………………………………… 5.      Tourists throw litter in the river. The water is polluted. If………………………………………………………………………………………..……...…… 6.      I can't swim, so I'm not going scuba - diving with you. If…………………………………………………………………………………………..……...…… 7.      There was a test yesterday. I didn't know that, so I didn't study for it. If……………………………………………………………………………………………..……...…… 8.      These students do not work hard. They can't pass the exam. If……………………………………………………………………………………………..……...…… 9.      If you are not careful, you will cut yourself with that knife.  Unless…………………………………………………………………………………………………… 10. If we had more rain, our crops would be better.  Unless………………………………………………………………………………………………………….  

Để hoàn thành câu hỏi trên, ta cần điền vào chỗ trống phần "If..." hoặc "Unless..." một cụm từ/phrases hoàn chỉnh để tạo thành một câu hoàn chỉnh và có ý nghĩa. Dưới đây là cách làm cho mỗi câu hỏi:

1. If Phong had enough money, he could travel abroad.
Unless Phong has enough money, he can't travel abroad.

2. If I drive too close to the animals on safari, they will get scared.
Unless I drive too close to the animals on safari, they won't get scared.

3. If Tom had a passport, he could travel abroad.
Unless Tom has a passport, he can't travel abroad.

4. If I had bought it, it would have been because I had enough money.
Unless I buy it, it will be because I don't have enough money.

5. If tourists stop throwing litter in the river, the water won't be polluted.
Unless tourists stop throwing litter in the river, the water will be polluted.

6. If I could swim, I would go scuba-diving with you.
Unless I can swim, I won't go scuba-diving with you.

7. If I had known there was a test yesterday, I would have studied for it.
Unless I knew there was a test yesterday, I wouldn't study for it.

8. If these students worked hard, they would pass the exam.
Unless these students work hard, they can't pass the exam.

9. Unless you are careful, you will cut yourself with that knife.

10. Unless we have more rain, our crops won't be better.

5. Unless tourists stop throwing litter in the river, the water will remain polluted.

4. Unless I had enough money, I didn't buy it.

3. Unless Tom has a passport, he can't travel abroad.

2. Unless I drive too close to the animals on safari, they don't get scared.