题目内容
Beavers(水獭) were once nearly extinct (绝种的). But they have made a surprising comeback in the United States. In the early ___1___ of our country, they were seen as an easy source of ___2___ and were often___3___. Beaver pelts(毛皮) were ___4___ like money, and the fur was ___5___ priced in Europe. In 1600, there must have been about sixty million beavers in North America, some in almost every stream and river. Beavers are easy to catch because they ___6___ signs of their ___7___ everywhere. But by the late 1800, the animals were almost ___8___ to find．Two things happened to save the beaver. Beaver hats went out of style and people ___9___ laws to protect the beaver. It was___10___ that without heavers many rivers were drying up and some other animals were ___11___. With a little protection beavers began to ___12___ again. Today there are about two million beavers just in the United States. ___13___ a student in wildlife ___14___, my job had two parts: to record beaver activity each day and to record any other animals I saw at “My Place”. The colony(群) I observed ___15___ to have two adult beavers and young beavers. I had to stay ___16___ for a long time ___17___ I saw beaver. Finally, the adults came ___18___ down the stream, dragging long branches behind them. If I ___19___ them, one would have given the beaver alarm call—a loud slap ___20___ the water with its tail, and both would have dived to the safety of their home.1．A．history
B．year
C．century
D．month
2．A．nature
B．life
C．money
D．food
3．A．saved
B．caught
C．seen
D．sold
4．A．changed
B．bought
C．cost
D．exchanged
5．A. highly
B．low
C．more
D．less
6．A．keep
B．leave
C．draw
D．cut
7．A．presence
B．tails
C．bodies
D．heads
8．A．easy
B．unnecessary
C．impossible
D．strange
9．A．resisted
B．made
C．supported
D．agreed
10．A．noticed
B．seemed
C．looked
D．suggested
11．A．disappeared
B．killed
C．disappearing
D．saved
12．A．raise
B．reduce
C．disappear
D．increase
13．A．Like
B．As
C．To be
D．To like
14．A．was known
B．was seen
C．biology
D．plants
15．A．was known
B．was seen
C．was left
D．ought
16．A．silent
B．quiet
C．still
D．calm
17．A．when
B．after
C．as soon as
D．before
18．A．swimming
B．climbing
C．running
D．walking
19．A．had known
B．had seized
C．had frightened
D．had driven
20．A．in
B．on
C．over
D．above
提示：
| 1.
只有history才能和early连用，早期历史，其他三个词都不可以
2. 从下文可以看出，人们猎杀海濑主要是为了获利，所以将海濑看为钱财资源 3. 为了获利而猎杀海濑，所以不停地捕捉， 4. exchange交易，海濑皮象金钱一样交易 5. price这里是动词，表示定价，用高低来表示，low意思不符 6. sign标记，海濑之所以容易捕捉，因为他到处留下标记，选择leave留下 7. presence出现，tail尾巴，body身体，head头，应该是在出现过的地方留下标记 8. easy容易，unnecessary不需要，impossible不可能，strange奇怪，经过大规模的捕杀之后要找到海濑几乎不可能了 9. resist抵抗，make制定，support支持，agree同意，人们制定法律来保护海濑 10. notice注意，seem好像，look看，suggest建议，海濑已经被捕杀了，事实已经发生了，河流应该已经干涸了，人们注意到这个事实才会想到保护海濑 11. 因为河流干涸，导致不好的结果，应该是正在消失，disappear没有被动语态 12. raise上升，reduce减少，disappear消失，increase增加 13. as这里是作为的意思 14. wildlife biology野生生态学 15. 我所调查的海濑窝到现在所知有两个成年海濑 16. 这里的still是副词安静的意思，其他都是形容词，不能修饰动词 17. 我呆很长一段时间才能看到海濑，前一件事在前，选择before 18. down the stream进入小溪，只可能是游泳 19. 从下文看，海濑会发出警报只有可能是受到惊吓，选择frighten 20. 在水上才能发出警报的声音
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