2. 外语
  3. Color is very important to most animals for it helps them to get along in the world. Color【C1】______to make an animal difficult

Color is very important to most animals for it helps them to get along in the world. Color【C1】______to make an animal difficult

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问题     Color is very important to most animals for it helps them to get along in the world. Color【C1】______to make an animal difficult for its enemies to【C2】______. Many animals match their【C3】______so well that as long as they do not move no one is【C4】______to see them. You probably have often "jumped" a rabbit. If you【C5】______, you know how the rabbit sits perfectly still【C6】______you are just a few feet away. You【C7】______see the rabbit till it runs for its【C8】______matches very closely the place where it is【C9】______. Many times you may have walked past a rabbit【C10】______didn’t run and you never knew it was there at all.
    One of the most usual color schemes that helps animals to keep【C11】______being seen, is a dark back and light underpants. If an animal is the same color all【C12】______, there is always a dark shadow along the animal’s belly(腹部).【C13】______an enemy couldn’t see the animal he could see this dark shadow. The shadow makes the animal【C14】______out to view. But if the belly is【C15】______than the rest of the animal, the shadow will not be noticed.
【C5】
选项 A、do not
B、had not
C、did
D、have
答案D
解析 此处为省略句。根据前句You probably have often“jumped’，a rabbit，完整的句子应为：If you have often jumped a rabbit…。A、B、C项均无法使句子正确。
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