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 (触角) 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. 请把答案填入()。
　　A. living B. alive 　C. lively D. live
　　2. 请把答案填入()。
　　A. taken B. gotten C. haven D. eaten
　　3. 请把答案填入()。
　　A. produce 　B. reproduce 　C. run 　D. swim
　　4. 请把答案填入()。
　　A. Any 　B. Every C. Certain D. Each
　　5. 请把答案填入()。
　　A. beautiful B. short 　C. poisonous D. long
　　6. 请把答案填入()。
　　A. swimming B. survival 　C. flight 　D. growth
　　7. 请把答案填入()。
　　A. color B. body C. width D. length
　　8. 请把答案填入()。
　　A. run away B. flee 　C. touch D. move
　　9. 请把答案填入()。
　　A. way B. means C. method D. approach
　　10. 请把答案填入()。
　　A. make B. do 　C. build 　D. produce
　　【参考答案】
　　1. A 根据四个单词的区别，“生物”应为living things.
　　2. D 固定搭配：avoid doing sth.意为“避免做某事”。
　　3. B 根据上下文意思，此处指动植物“再生”。
　　4. C 由谓语动词形式可知，certain指“某些”。
　　5. C 根据下文得知此处指“有毒的”触角。
　　6. B 指海底动植物生存的另一种方法。
　　7. A 这些动物有与周围环境相同的颜色，即保护色。
　　8. C 所有动物对触摸很敏感。
　　9. B 固定搭配，by means of 意为“用……的方法”。
　　10. A 固定搭配，make sound / noise意为“弄出声音”。

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