【題目】As students, we must ________ on our studies and work hard instead of fooling around.

A.investigateB.memoriesC.approachD.concentrate

【答案】D

【解析】

考查動(dòng)詞詞義辨析。句意：作為學(xué)生，我們必須集中精力于學(xué)習(xí)和努力學(xué)習(xí)，而不是游手好閑。A.investigate調(diào)查； B.memories記憶； C.approach接近； D.concentrate集中。根據(jù)instead of fooling around可知此處表示集中精力于學(xué)習(xí)和努力學(xué)習(xí)，固定短語concentrate on集中精力于，全神貫注于，專注于。故選D項(xiàng)。

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