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  3. A major reason for 【21】______ in the animal world is territory. The male animal establishes an area. The size of the area is

A major reason for 【21】______ in the animal world is territory. The male animal establishes an area. The size of the area is

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问题      A major reason for  【21】______   in the animal world is territory. The male animal establishes an area. The size of the area is sufficient to provide food for him, his  【22】______   and their offspring. Migrating birds, for example,  【23】______   up the best territory in the order of" first come, first  【24】______   . "The late arrivals may acquire larger territories, but less food is  【25】______   ,or they are too close to the  【26】______   of the enemies of the species.  【27】______   there is really insufficient food or the danger is very great, the animal will not mate. In this way, the members of the species which are less fit will not have  【28】______   .
    When there is conflict  【29】______   territory, animals will commonly use force, or  【30】______   of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use the  【31】______   amount of force necessary to drive away the  【32】______   . There is usually no killing. In tile case of those animals which are  【33】______   of doing each other great harm, there is a system for the  【34】______   animal to show the winning animal that he wishes to  【35】______   . When he shows this, the  【36】______   normally stops fighting. Animals especially birds, which can easily escape from conflict seem to have no obstacle against killing, equally no mechanism  【37】______   submission. The defeated bird simply flies away. However, if two doves are  【38】______   in a cage, and they start fighting, they will continue to fight until one kills the other. We all think of the dove as a  【39】______   of peace and, in its natural habitat,it is peaceful. But the" peace "mechanism does not  【40】______   in a cage.
【35】
选项 A、conquer
B、submit
C、overwhelm
D、defeat
答案B
解析 B submit意为“(使)顺从，(使)服从，投降”。本句之意是，失败的一方向胜利的一方表示其愿意服从于胜者。A conquer“征服、战胜、克服(困难等)”；C overwhelm“制服、压倒”；D “击败、战胜”均不合文意。
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