18. You have to take enough exercise _________ you want to be ___________.
A. when, health B. if, health
C. if, more healthy D. if, healthier
17. -Can you mend the car ___________?
A. all by yourself B. all by myself
C. youself D. yourself
16. -Must I come at five o'clock?
-Oh, no. You ____________come so early.
A. mustn't B. can
C. needn't D. don't need
15. Nothing is wrong with the watch, ____________?
A. is it B. isn't some thing
C. isn't it D. aren't they
14. ____________ night the temperature will fall __________ zero.
A. On, below B. At, above
C. In, under D. At, below
13. Look! Who ___________ a bike on the road?
A. rode B. rides C. is driving D. is riding
12. The doctor ___________ me carefully.
A. looked at B. looked over C. looked out D. looked up
11. You have to eat __________ food when you want to be thinner.
A. less B. more C. a little D. much
10. In Summer, our teacher often has ___________.
A. a swim lesson B. swimming lesson
C. an swimming lesson D. a swimming lesson
9. Lily fell ___________ her bike. But she didn't hurt ____________.
A. into … herself B. off… herself
C. of… himself D. onto… herself