Look! The students _____ the classroom.

A．clean B．a(chǎn)re cleaning
C．a(chǎn)re cleanD．cleaning

B

解析試題分析：句意：看，學(xué)生們在打掃教室。根據(jù)句中提示詞look可知此句時(shí)態(tài)應(yīng)是現(xiàn)在進(jìn)行時(shí)態(tài)，其基本結(jié)構(gòu)是be+動(dòng)詞ing，所以選B。
考點(diǎn)：考查動(dòng)詞時(shí)態(tài)

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