Do you know why different animals or pests(害虫) have their special colors? Colors in them seem to be mainly used to
1 themselves.
Some birds like eating locusts(蝗虫), but birds cannot
2 catch them. Why? It is because locusts change their
3 with the change of the colors of crops. When crops are green, locusts look
4 . But as the harvest time comes, locusts change into the same brown color
5 crops have. Some other pests whose colors are
6 plants are easily found and eaten by
7 . So they have to hide themselves for lives and appear only
8 .
If you
9 animals’ life, you’ll find the main use of colors is to protect
10 . Bears, lions and other animals
11 quietly through forests. They cannot be easily seen by hunters
12 their colors are much like the trees.
Colors are useful not only on the land, but also in the
13 . A kind of fish can
14 a kind of black liquid(液体) when they face danger. The liquid spreads over quickly, so they cannot be found by their enemies and can quickly swim away. That is
15 they can live safely though they are not strong at all. So colors are really useful to animals.
| 小题1: |
| A．show |
B．protect |
C．kill |
D．interest |
|
| 小题2: |
| A．easily |
B．freely |
C．safely |
D．differently |
|
| 小题3: |
| A．sizes |
B．smells |
C．colors |
D．shapes |
|
| 小题4: |
| A．yellow |
B．red |
C．black |
D．green |
|
| 小题6: |
| A．different from |
B．same as |
C．similar to |
D．opposite with |
|
| 小题7: |
| A．other |
B．others |
C．the others |
D．another |
|
| 小题8: |
| A．in the morning |
B．at noon |
C．at night |
D．in the daytime |
|
| 小题9: |
| A．study |
B．write |
C．draw |
D．work |
|
| 小题10: |
| A．them |
B．themselves |
C．it |
D．itself |
|
| 小题11: |
| A．run |
B．fight |
C．move |
D．eat |
|
| 小题12: |
| A．because |
B．so |
C．and |
D．although |
|
| 小题13: |
| A．forests |
B．desert |
C．sea |
D．mountains |
|
| 小题14: |
| A．keep out |
B．come out |
C．look out |
D．give out |
|
| 小题15: |
| A．why |
B．when |
C．how |
D．where |
|
