13. Although________ my opinion, the old professor didn’t come up with his own.

　A. in 　　　　　　　B. against　　　　　　 C. for　　　　　　　　　 D. on

12. Not until the motorbike looked almost new________ repairing and cleaning it.

　　 A. he stopped　　　 B. did he stop　　　　　 C. stopped he　　　　　　 D. he did stop

11. Between the two generations, it is often their education ________ their age that causes misunderstanding.

　　 A. rather than　　　 B. more than　　　　　 C. other than　　　　　　 D. less than

10. Last week, only two people came to look at the house, ________ wanted to buy it.

　　 A. none of them　　 B. both of them　 　　　C. none of whom　　　　 D. neither of whom

9. Meeting my uncle after all these years was an unforgettable moment, _______ I will always treasure.

A. that　　　　　　 B. one　　　　　　　　 C. it　　　　　　　　　 D. what

8. This is your last chance. You may as well­­­­­­­­­­­­­­­­­­­­­­­­­­_______ full advantage of it.

A. make　　　　　 B. making　　　　　　　 C. take　　　　　　　　 D. taking

7. -- The room is so dirty. _______ we clean it?

　 -- Of course.

A. Will　　　　　　 B. Shall　　　　　　　　 C. Would　　　　　　　 D. Do

6. ________ well prepared you are, you still need a lot of luck in mountain climbing.

A. However　　　　 B. Whatever　　　　　　 C. No matter　　　　　 D. Although

5. You should make it a rule to leave things________ you can find them again.

A. when　　　　　 B. where　　　　　　　 C. then　　　　　　　　 D. which

4. It was only when I fully understood the poem_______ to appreciate its beauty.

A. did I come　　　 B. that I came　　　　　 C. then I came　　　　　 D. had I come