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        1. Look! The students _____ the classroom.

          A.cleanB.a(chǎn)re cleaning
          C.a(chǎn)re cleanD.cleaning

          B

          解析試題分析:句意:看!這些學(xué)生們正在打掃教室。分析:考查現(xiàn)在進行時的用法,構(gòu)成:be doing,主語是第三人稱復(fù)數(shù),因此be 動詞用are.故選 B
          考點:考查動詞的用法。

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