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NO.6
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题目来源 : 填空经典1500题
Select the two answer choices that, when used to complete the sentence, fit the meaning of the sentence as a whole and produce completed sentences that are alike in meaning.

Wilson is wont to emphasize the _____ of ants: how ants with full stomachs will regurgitate liquid food for those without, or how the old will fight so the young can survive 

beneficence
altruism
unpredictability
intelligence
fecundity
fertility

Select two answer choices.

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