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20.As a general rule,it's important to ______ between effectiveness and absolute time commitments.(  )
A.acknowledgeB.differentiateC.confirmD.justify

分析 一般说来,区别有效性和绝对的时间投入很重要.

解答 答案是B.本题考查动词词义辨析.A项表示"承认,致谢";B项表示"区别",differentiate between A and B 区别A和B;C项表示"证实";D项表示"证明…有理";根据句意和搭配判断,答案选择B项,其它选项不符合逻辑.

点评 本题考查动词词义辨析,考生在平时的学习中应注意积累相应的词汇和搭配,并牢记其意思.在做题时,将词义和题干相结合,从语法、句子结构尤其是句意上去判断,句意通顺,符合逻辑,即正确答案.

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