Câu trả lời:
D. Rewrite these sentences as directed:
1. He doesn’t eat fish when he isn’t extremely hungry.
à If he isn't extremely hungry, he doesn't eat fish.
2. We didn’t hurry, so we were late for the concert.
à If we had hurried, we wouldn't have been late for the concert.
3. In order to get a driver’s license, you must be at least 18 years old.
à If you want to get a driver's license, you must be at least 18 years old.
4. A person must have a passport to be able to travel abroad.
à A person cannot travel abroad unless he has a passport.
5. Ann’s having a lot of trouble because she lost her passport last week.
à If Ann hadn't lost her passport last week, she wouldn't be having a lot of trouble.
6. Tom doesn’t do anything if you don’t tell him what to do.
à Unless you tell Tom what to do, he doesn't do anything.
7. We must take steps to preserve natural resources, or the planet will be in danger.
à Unless we take steps to preserve natural resources, the planet will be in danger.
8. It’s such a pity your sister can’t come as well.
à If only your sister could come as well.
9. The soil would become poor unless the farmer added fertilizers.
à If the farmer added fertilizers, the soil wouldn't become poor.
10. You probably won’t have time, but I’d like you to come and see.
à If you have time, I'd like you to come and see.