23. His great discovery ______ his determination and devotion to science.

　 A. caused 　　　　　　　　　 B. led to　　　　　　　　　 C. lies in 　　　　　　　　 D. resulted in

22. We’ll get more money in the years _____.

　 A. coming　 　　　　　　　 D. to have come　　　　 C. to come 　　　　　　　 D. come

21. With the help of the government, a large number of people _____ after the flood in 1991.

　 A. suffered 　　　　　　　　 B. remained　　　　　　　 C. survived 　　　　　　　 D. pleased

20. We do not have a _____ school in our institute. The highest degree we provide for the students is a BA and BS.(文学士，理学士)

　 A. regular　　　　　　　　　 B. normal 　　　　　　　　 C. graduate　　　　　　　 D. technical

19. _____ universe is no longer ______ mystery to us.

　 A. The; a　　　　　　　　　　 B. A; a 　　　　　　　　　　 C. /; a　　　　　　　　　　　 D. /; /

18. Which do you enjoy ________ your weekends, boating or fishing on the lake?

　 A. to spend　　　　　　　　 B. spending　　　　　　　 C. to have spent　　　　 D. having spent

17. Is this the way _________ you worked out the physics problem?

A. where 　　　　B. by which 　　　C.不填 　　　　　D. in that　

16. The workers of the company, who have very strict orders, must have their long hair _________ while at work.

A. tied back 　　　B. to tie back　　 C. tying back 　　　D. tie back　

15. _________ through the gate and you’ll find the entrance to Bear Country on the other side.

A. Walking 　 　　　B. Walk　　　　 C. If you walk 　　　D. When walking　

14. ---I would never ever come to this restaurant again. The food is terrible!

　 ---_____.

A. Nor am I　　 　　　 B. Neither would I　　 C. Same with me　 　 D. So do I