【題目】It's said that our mental abilities begin to _______ from the age 27 after reaching the highest level at 22.

A.differB.depressC.distributeD.decline

【答案】D

【解析】

考查動詞詞義辨析。句意：據(jù)說我們的智力在22歲時達(dá)到峰值之后，從27歲開始下降。A. differ不同；B. depress使沮喪；C. distribute分發(fā)；D. decline下降。根據(jù)句意，尤其是reaching the highest level可知此處用“下降”符合語境，故選D項。

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