chúc bạn học tốt ạ :3

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II/
1. Unless you study hard enough, you will fail in the exam.
2. Unless he keeps his feet dry, he will catch a cold.
3. Unless you leave me alone, I'll call the police.
4. Unless everybody sends him for a doctor, the child will die.
5. If you don't get a visa, you can't visit the United States.
6. If he doesn't phone immediately, he won't get any information.
7. Unless someone puts the coal in, the fire won't go out.

8. If we don't reduce the use of water and electricity, we'll have to pay more this month.
9. If you don't start at once, you'll be late.
10. If he doesn't phone immediately, he won't get any information.
III/
1. If he had enough money, he could buy the shirt.
2. If he told them the truth, they wouldn't punish him.
3. If we had enough money, we would buy new books.
4. If the weather hadn't been bad, we could have gone out.
5. If I were him, I wouldn't refuse such a good job.
6. If he hadn't smoked lost of cigarettes, he wouldn't have had a cough.
7. If you didn't drink too much coffee, you could sleep.