完形填空

阅读下面短文，掌握其大意，然后从1～25各题所给的四个选项中，选出一个最佳答案。

(A)

　Have you ever wondered why the skins of animals have unusual colours? Colour in animals 　1　either “protective” (保护的) or“warning” .

　Birds, monkeys and spiders (蜘蛛) are very 　2　　　 butterflies (蝴蝶) , but there are some butterflies which are 　3　　　 . They had a bad taste and bright colour, and this bright colour 　4　　　 a danger signal to the birds, monkeys and spiders. These butterflies can 　5　　 　in daylight while the ones which are fit to be eaten have to hurry 　6　　 　through the very dark parts of the forest.

　But if you study the 　7　　 　in any part of the world,you will find that the chief use of colouring is protection. Lions,tigers and other beasts move quietly through great masses of jungle (丛林) . They are often invisible to the eyes. The skin of the tiger looks 　8　　　 the stalks (梗) of the jungle.

　But 　9　　 　act remains to be noted. After the rainy season,the new green grasses spring up. All the withered grass (枯草) insects seem 　10　　 　. Their colour would be no protection to them. and their places are now coloured as green as the new grass . Whether they are new insects or only the new green grasses,nobody knows.

1.

[　　]

A. happen to be　　　B. happens to be

C. seem to be　　　　D. seems to be

2. 

[　　]

A. fond of　　　　　　B. fond for

C. like to　　　　　　D. like for

3.

[　　]

A. not used to being eaten

B. not fit to be eaten

C. fit for them to be eaten

D. not fit to eat

4.

[　　]

A. serves for　　　　　B. act for

C. serves as　　　　　 D. act to

5.

[　　]

A. fly freely　　　　　B. run quickly

C. jump high　　　　　 D. sing gladly

6.

[　　]

A. on terror(恐怖)to their lives

B. be afraid of their lives

C. to terror to their lives

D. in terror for their lives

7.

[　　]

A. butterflies habit　　B. monkeys action

C. animal life　　　　　D. animal deeds

8.

[　　]

A. much more like　　　　B. very like

C. much like　　　　　　 D. many more like

9.

[　　]

A. a even more strange

B. an even much more strange

C. an even more strange

D. an much more strange

10.

[　　]

A. to be disappeared　　　B. to disappear

C. to be disappearing　　 D. to disappearing

(B)

　In the autumn every leaf that falls to the ground in the wind tells a story. Little holes in the leaf may tell us that 　11　during its life 　12　　 　insects came to make holes in it. Small light-coloured spots 　13　　　 across its face may show the troubles the leaf has had. The leaf, 　14　　　 , tells us a very special story. The story it tells is about a caterpillar (毛毛虫), the leaf miner. Do you see those small lines 　15　　　 the leaf? Notice, 　16　　 　the longer line, that one end is very narrow but the other end is 　17　　　 During the summer a very small insect 　18　　 　the leaf and 　19　　 　. Later a tiny caterpillar came from the egg and began eating its way through the leaf. As it 　20　　 　inside the leaf, eating along the way, the caterpillar grew larger and larger. Finally it made a tunnel to the leaf's surface and turned into a grownup insect with wings. The winding lines we see 　21　　 　across the leaf are the turnnels 　22　　 　the leaf-miner —caterpillar.

　Looking for leafminer tunnels is very interesting. They can 　23　　 　trees are found. Look for them on 　24　　 　of plant, including garden plants and roadside grass,If you discover a leaf with a leaf-miner tunnel in it,take a magnifying　glass (放大镜) and 　25　　 　the end of the wide part of the tunnel. You may be able to see the holes where the leaf-miner finally ate its way to the surface of the leaf and entered the outside world.

11. 

[　　]

A. some time　　 　　　　　B. sometimes

C. some times　　　　　　　D. always

12.

[　　]

A. one or less　　　 　　　B. one or more

C. more or less　　　　　　D. one or fewer

13.

[　　]

A. to be dotted (布满)　　　B. to have dotted

C. being dotted　　　　　　 D. dotted

14. 

[　　]

A. however　　　　　　　　　B. but

C. and　　　　　　　　　　　D. so

15. 

[　　]

A. winded across　　　　　　B. winding across

C. winding over　　　 　　　D. winded over

16.

[　　]

A. especial on　　　  　　　B. especially with

C. especially on　　　　　　D. especial at

17. 

[　　]

A. more wider　　　　　　　　B. very wider

C. much wider　　　　　　　　D. much more wide

18. 

[　　]

A. flew onto　　　　　　　　　B. flying into

C. coming through　　　 　　　D. went into

19.

[　　]

A. laid an egg inside the leaf　　　B. laying an egg outside the leaf

C. lying an insect on the leaf　　　D. fallen itself beside the leaf

20. 

[　　]

A. wandering (蜿蜒曲折)　　　　B. came

C. wandered　　　　　　　　　　D. wondering

21.

[　　]

A. passed　　　　　　　　　　　B. passing

C. pasting　　　 　　　　　　　D. pasted

22. 

[　　]

A. made from　　　　　　　　　B. made in

C. made by　　　　　　　　　　D. made up of

23. 

[　　]

A. be looked for somewhere　　　　B. be looked at everywhere

C. be finding in some places　　　D. be found anywhere

24.

[　　]

A. every branch　　　　　　　　　B. every kind

C. every corner　　　　　　　　　D. every stick

25. 

[　　]

A. looked closely at　　　　　　　B. looking close into

C. look closely at　　　　　　　　D. having looked to