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.
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
— Would you mind my using your car?
— . Here is the key.
A.Of course B.Not at all C.Certainly D.Sorry
The flower smells ________ and I like it very much.
A.well B.good C.bad D.badly
—When will Han Han’s new book ________?
—Sorry, I don't know. I’m looking forward to his new book, too.
A.come out B.come on C.come in D.come over
—Can you tell me________? —Two weeks ago.
A.when you bought the toys B.who did you buy the toys for
C.how much the toys cost D.how many toys did you buy
—Did you read today’s newspaper?
—Yes,I did. There is .Do you want to know it?
A.exciting something B.something exciting
C.exciting anything D.anything exciting