Question

Do you know why different animals or pests(害蟲) have their special colors? Colors in them seem to be mainly used to____themselves.

Some birds like eating locusts(蝗蟲), but birds cannot____catch them. Why? It is because locusts change their____with the change of the colors of crops. When crops are green, locusts look____But as the harvest time comes, locusts change into the same brown color____crops have. Some other pests whose colors are____plants are easily found and eaten by____So they have to hide themselves for lives and appear only____

If you____animals’ life, you’ll find the main use of colors is to protect____Bears, lions and other animals____quietly through forests. They cannot be easily seen by hunters____their colors are much like the trees.

Colors are useful not only on the land, but also in the____A kind of fish can______________液體) when they face danger. The liquid spreads over quickly, so they cannot be found by their enemies and can quickly swim away. That is____they can live safely though they are not strong at all. So colors are really useful to animals.

1.A. show B. protect C. kill D. interest

2.A. easily B. freely C. safely D. differently

3.A. sizes B. smells C. colors D. shapes

4.A. yellow B. red C. black D. green

5.A. so B. as C. like D. with

6.A. different from B. same as C. similar to D. opposite with

7.A. other B. others C. the others D. another

8.A. in the morning B. at noon C. at night D. in the daytime

9.A. study B. write C. draw D. work

10.A. them B. themselves C. it D. itself

11.A. run B. fight C. move D. eat

12.A. because B. so C. and D. although

13.A. forests B. desert C. sea D. mountains

14.A. keep out B. come out C. look out D. give out

15.A. why B. when C. how D. where

Answer 1