When I entered Berkeley, I hoped to earn a scholarship．Having been a Straight-A student，I believed I could l6 tough subjects and really learn something. One such course was World Literature given by Professor Jayne．I was extremely interested in the ideas he l7 in class．

　 When I took the first exam，I was l8 to find a 77，C-plus, on my test paper,19 English was my best subject，I went to Professor Jayne, who listened to my arguments but remained 20．　

　 I decided to try harder, although I didn’t know what that 21 because school had always been easy for me．I read the books more carefully, but got another 77，Again，I 22 with Professor Jayne．Again，he listened patiently but wouldn’t change his 23．

　 One more test before the final exam．One more 24 to improve my grade．So I redoubled my efforts and for the first time 25 the meaning of the word "thorough”. But my 26 did no good and everything 27 as before.

　 The last hurdle(障碍)was the final．No matter what 28 I got, it wouldn’t cancel three C-pluses．I might as well kiss the 29 goodbye．

　 I stopped working hard．I felt I knew the course material as well as I ever would．The night before the final，I even 30 myself to a movie．The next day I decided for once I'd have 31 with a test．

　 A Week later．I was surprised to find I got an A．I hurried into Professor Jayne's office. He 32 to be expecting me．“If I gave you the As you 33，you wouldn’t continue to work as hard．’’

　 I stared at him，34 that his analysis and strategy were correct. I had worked my head 35, as I had never done before．

I was speechless when my course grade arrived：A-Plus．It was the only A-plus given．The next year I received my scholarship．I've always remembered Professor Jayne’s lesson：you alone must set your own standard of excellence．

16．A．take　 B．discuss 　　　　C．cover 　　　 D．get

17．A．sought　 B．presented　　 C．exchanged　 D．obtained

18．A．shocked　 B．worried　　 C．scared 　　　D．anxious

19．A．but　 B．so　　　　　　 C．for 　　　　 D．or

20．A．unchanged 　 B．unpleasant C．unfriendly D．unmoved

21．A．reflected　 B． meant 　　C．improved D．affected

22．A．quarreled　 B．reasoned　 C．bargained D．chatted

23．A．attitude　 B．mind　　　 C．plan 　　 D．view

24．A．choice　 B．step　　　　　 C．chance 　D．measure

25．A．memorized　 B．considered C．accepted 　D．1earned

26．A．ambition　 B．confidence　 C．effort 　 D．method

27．A．stayed　 B．went　　　 C．worked D．changed

28．A．grade　 B．answer　　 C．lesson 　D．comment

29．A．scholarship　 B．course C．degree 　D．subject

30．A．helped　 B．favored　 C．treated 　D．relaxed

31．A．fun　 B．luck　　　　 C．problems D．tricks

32．A．happened　 B．proved　 C．pretended 　D．seemed

33．A．valued　 B．imagined　 C．expected　 D．welcomed

34．A．remembering B．guessing C．supposing　 D．realizing

35．A．out　 B．over　　 C．on 　　　　D．off

完型填空

阅读下面短文，掌握其大意，然后从以下各题所给的A，B，C，D四个选项中选出可以填入空白处的最佳选项。

　　Although vitamin C is an 1 defender of body cells, the vitamin can also play a “dual” (双重的) role 2 , at times, actually damages cells' genetic (遗传的) material, new research 3 . Investigators say their findings 4 help explain why high-dose(剂量) vitamin C has so far 5 as an experimental cancer therapy.

　　 6 the June 15^th issue of Science, researchers at the University of Pennsylvania in Philadelphia 7 on their test-tube experiments 8 that vitamin C is 9 of giving rise to DNA-damaging substances called genotoxins.

　　Previous research has shown vitamin C can 10 DNA damage, but the new research demonstrates a 11 avenue (途径，方法) the vitamin can take in doing 12 .

　　Moreover, according to lan A. Blair and his colleagues, the 13 may offer one reason why vitamin C has failed to 14 the expectations of some who believe 15 can help treat cancer.

　　In the average person, Blair explained in an interview, vitamin C may regularly act as 16 a cell's friend 16 foe (敌人), making a daily megadose (大剂量) of vitamin C 17 to fight illness. “ 18 could be an explanation for 19 a good diet is better than 20 a single vitamin,” he said.

1．

[　　]

2．

[　　]

3．

[　　]

4．

[　　]

5．

[　　]

6．

[　　]

7．

[　　]

8．

[　　]

9．

[　　]

10．

[　　]

11．

[　　]

12．

[　　]

13．

[　　]

14．

[　　]

15．

[　　]

16．

[　　]

17．

[　　]

18．

[　　]

19．

[　　]

20．

[　　]