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We must draw a lesson from the accident. It is wise to learn from the past mistakes ______ the future ones.

A. avoid      B. avoiding     C. avoided         D. to avoid

D非谓语动词——不定式短语作目的状语。

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第二部分
I 完形填空(共15小题,每小题2分,满分30分)
阅读下面短文,从短文后所给各题的四个选项(A、B、C、D)中选出能填入空白处的最佳选项,并在答题卡上将该项涂黑。
Sea turtles have been on Earth for millions of years, but they may soon die out. The main 11   to them is people who kill them for food, according to Dr. Wallace J. Nichols of the University of California.
But the latest news may   12    turtle hunting: Dr. Nichols has found that sea turtles    13   a lot of pollution from the ocean. This pollution is 14    for both turtles and ___15_____ It can cause __ 16 __ damage to their bodies and lead to death. Research shows that many people get sickand even  17  eating sea turtle meat. 
In the US, most people have    18  eaten turtle. This is because turtles are   19   by the United States law, which makes it  20    to harm or kill these amazing animals.“But many people in other countries still eat them,” explains Nichols. “Our first  21   was to save turtles; now we must save  22    too.”
Davis said he also wants to send out a bigger  23   that we should protect the oceans.“The   24  of the ocean, animals in the ocean, and our own health are all   25   . A clean ocean is really good for us too because of the food we eat from there.”
11 A. doubt              B. stream             C. danger            D. worry
12 A. accelerate          B. slow               C. improve           D. change
13 A. cause              B. expand             C. absorb            D. reduce
14. A. beneficial                   B. unhealthy                 C. unfit                    D. annoying
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16.A. accidental          B. occasional           C. unknown          D. serious
17. A. die from                    B. survive from            C. suffer from         D. free from
18. A. often                         B. seldom                    C. never                     D. rarely
19. A. qualified           B. protected           C. restricted          D. produced
20. A. impossible          B. difficult           C. illegal              D. abnormal
21. A. goal               B. impression         C. difficulty           D. cost
22. A. Earth              B. ocean             C. people             D. animals
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