When the teacher came into the classroom, the students ____ in groups.

A．work             B．have worked       C．were working      D．a(chǎn)re working

 

【答案】

C

【解析】

試題分析：句意：當(dāng)老師走進(jìn)教室的時候，學(xué)生正在分組學(xué)習(xí)。老師進(jìn)來這個動作發(fā)生在過去，所以學(xué)生正在做某事，是過去的動作，所以用過去進(jìn)行時態(tài)，故選C

考點(diǎn)：時態(tài)

點(diǎn)評：動詞的時態(tài)是學(xué)習(xí)英語過程中非常重要的知識。而很多的題目，句中并沒有像本題一樣有明確的時間，很多要通過上下文的判斷得知。過去進(jìn)行時既可以表示動作在過去的某個時間正在進(jìn)行，也可以表示動作在過去的某一段時間一直在進(jìn)行，本題不難，平時加強(qiáng)記憶，理解即可。

 

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