【題目】Look! The students _____ the classroom.

A. clean B. are cleaning C. are clean D. cleaning

【答案】B

【解析】

試題分析：句意：看，學(xué)生們?cè)诖驋呓淌摇?/span>A. clean打掃。一般現(xiàn)在時(shí)形式；B. are cleaning正在打掃。現(xiàn)在進(jìn)行時(shí)形式；C. are clean是干凈的。后帶有賓語(yǔ)，該用動(dòng)詞形式，不是用形容詞形式。錯(cuò)。D. cleaning打掃，現(xiàn)在進(jìn)行時(shí)由am, is, are+現(xiàn)在分詞構(gòu)成。錯(cuò)。由look可知，后面的動(dòng)作能被看到，正在發(fā)生，句子用現(xiàn)在進(jìn)行時(shí)態(tài)。故選B。

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