13. Without facts, we can’t form a correct opinion, for we need to have actual knowledge___ our thinking.

A. which to be based on　 B. which to base on　 C. on which to base　 D. which to base

12. If you ___ be in time for the early bus, be sure to get up before five in the morning.

A. are to　　 B. are about to　　 C. are going to　　 D. are due to

11. Tom sat under a tree and seeing his friend, ___ up in no time.

A. to stand　　 B. standing　　 C. stood　　 D. would stand

10. We are only___ glad to do anything we can ___ her.

A. too, to help　 B. very, help　 C. too, help　　 D. very, helping

9. With all the magazines I needed ___ , I left the post office.

A. buying　　 B. to buy　　 C. bought　　 D. to be bought

8. -Did you have a good sleep last night?　 -Yes, never sleep ___ .

A. badly　　 B. better　　 C. worse　　 D. best

7. -How wide is the Yellow River?　 -That ___ from where to where.

A. depends　　 B. changes　　 C. refers　　 D. lies

6. Be tough-minded, but tender-headed, ___?

A. isn’t it　　 B. are you　　 C. aren’t you　　 D. will you

5. Doing your homework is a sure way to improve your test scores, and this is especially true ___ it comes to classroom tests.

A. before　　 B. since　　 C. when　　 D. unless

4. -It’s wrong for a student to follow ___ his teachers say.　 -It’s true. I can’t agree ___.

　A. whatever, more　 B. no matter what, more　 C. no matter what, much　 D. whatever, much