【題目】—Where’s Mike?

—He is working _____ physics _____ in the classroom.

A. in; problemB. for;problemC. in; problemsD. on; problems

【答案】D

【解析】

句意:——邁克在哪兒?——他正在教室里做物理題?疾榻樵~和名詞辨析。work in把…加進(jìn);work for為…而工作/效勞;work on致力于/從事。problem是可數(shù)名詞,前面沒(méi)有不定冠詞修飾,句中需用復(fù)數(shù)形式,可排除前兩項(xiàng)。根據(jù)句意語(yǔ)境,可知work on符合句意,故選D。

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