2. 外语
  3. A. prime B. added C. by D. reproductive E. excessive F. take G. extends H. produc

A. prime B. added C. by D. reproductive E. excessive F. take G. extends H. produc

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问题     A. prime        B. added        C. by          D. reproductive        E. excessive
    F. take         G. extends      H. producing   I. adult               J. proves
    K. on average   L. early        M. females     N. balance             O. helping
    Human males living with their moms may not expect to have much luck hooking up this Valentine’s Day. But among the northern Muriqui monkeys, males that spend the most time around their mothers seem to get a(n)【C1】________ boost when mating time rolls around.
    The findings, published in the Proceedings of the National Academy of Sciences USA, suggest that females in some species may have evolved to play a critical role in their sons’【C2】________ success. Karen Strier, the paper’s lead author and a professor at the University of Wisconsin-Madison, says the paper "【C3】________ " the so-called grandmother hypothesis, a concept in which human females evolved to live past their【C4】________ reproductive years to spend more time【C5】________ offspring.
    The research team observed and collected genetic data from a group of 67 wild monkeys living in a protected reserve in Brazil’s Atlantic Forest: infants, mothers and possible fathers. They found that six out of the thirteen【C6】________ males they studied spent more time around their mothers than would be expected by chance. These same six monkeys,【C7】________. reproduced the greatest number of offspring.
    The investigators are still trying to figure out why. "It’s not like we see moms intervening and helping their sons out," Strier says. "Maybe【C8】________ sitting near their moms, they get to see when females are sexually active, or maybe they just get more familiar with other【C9】________."
    The findings can help with future conservation efforts for the critically threatened animals. Strier says, "the last thing we would want to do is【C10】________ a male out of the group where it was born."
【C10】
选项
答案F
解析 此处要填入的部分作句子的表语，is前面出现了实义动词do，故空格处使用省略to的动词不定式。the last thing we would want to do意为“我们最不愿意做的事情”，下文的the group where it was born“出生的群体”实际上指的是母亲身边。从上文的“待在母亲身边有利于繁殖”，可推断我们最不愿意做的事情就是将雄性动物从出生的群体拿出来，词库中的take正确。
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