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All (1)_______ things must fight to stay alive. They have to feed on something and at the same time avoid being (2)_______. Therefore they have to solve this big problem of staying alive in their own way. The danger of being eaten in the sea is great. Those plants and animals that do survive usually (3)_______ very fast and in great numbers.

(4)_______ sea animals have defensive devices which help them to survive. The jelly fish have (5)_______ tentacles (觸角) which are used for attack and defense. Another method of (6)_______ which sea plants and animals use is disguise. They usually have the same (7)_______ as their surroundings.

In order to stay alive， animals need to have good senses. Fishes have sharp eyes. Almost all animals are sensitive to (8)_______. Fishes judge movements in the water by (9)_______ of their lines. Fishes and other sea animals can hear well and many of them can (10)_______ different types of warning sound.

1. A. living B. alive 　C. lively D. live

2. A. taken B. gotten C. haven D. eaten

3. A. produce 　B. reproduce 　C. run 　D. swim

4. A. Any 　B. Every C. Certain D. Each

5. A. beautiful B. short 　C. poisonous D. long

6. A. swimming B. survival 　C. flight 　D. growth

7. A. color B. body C. width D. length

8. A. run away B. flee 　C. touch D. move

9. A. way B. means C. method D. approach

10. A. make B. do 　C. build 　D. produce

1. A 根據(jù)四個(gè)單詞的區(qū)別，“生物”應(yīng)為living things。

2. D 固定搭配：avoid doing sth.意為“避免做某事”。

3. B 根據(jù)上下文意思，此處指動(dòng)植物“再生”。

4. C 由謂語動(dòng)詞形式可知，certain指“某些”。

5. C 根據(jù)下文得知此處指“有毒的”觸角。

6. B 指海底動(dòng)植物生存的另一種方法。

7. A 這些動(dòng)物有與周圍環(huán)境相同的顏色，即保護(hù)色。

8. C 所有動(dòng)物對(duì)觸摸很敏感。

9. B 固定搭配，by means of 意為“用……的方法“。

10. A 固定搭配，make sound / noise意為“弄出聲音”。

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