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8. If he has a temperature, he ______________ go to see the doctor.
9. If you wear sandals in the mountains, you ______________ slip on the
10. You ______________ be at home before 9 p.m if you don't want to be punished.
11. You ______________ watch TV if you finish your dinner.
12. If he likes eating spicy food, he ______________ add chilli.
13. You ______________ go climbing if it rains heavily.
14. You ______________ run a red light if you do not want to be fined by the police.
15. He ______________ go out if he doesn't finish his homework.

X. Rewrite the sentences without changing the meaning.
1. You don’t water the trees. The trees die.
If __________________________________________________________
2. It rains. We cancel the meeting.
If __________________________________________________________
3. I buy some gifts for my friends. I go on a trip.
If __________________________________________________________
4. My parents do exercise regularly. They are healthier.
If __________________________________________________________
5. We win the lottery. We buy a new house.
If __________________________________________________________
6. Tom uses his phone in class. He doesn’t understand the lesson.
If __________________________________________________________
7. Tomorrow isn’t Sunday. They don’t get up late.
If __________________________________________________________
8. He won’t win the competition. He won’t receive a lot of money.
If __________________________________________________________
9. She won’t appear. He won’t recover quickly.
If __________________________________________________________
10. John won’t know her telephone number. He can’t call her.
If __________________________________________________________
11. Alice may miss the train. But she can get the next one.
If Alice _____________________________________________________
12. Fail to pay and they will cut off the electricity.
If __________________________________________________________
13. Stop talking or you won’t understand the lesson.
If __________________________________________________________
14. If Linh doesn’t come here early, she will miss the bus.
Unless _______________________________________________________
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