【題目】Look! The volunteers________clean up our community.

A.helpedB.will helpC.are helpingD.have helped

【答案】C

【解析】

句意:看!志愿者們正在幫助打掃社區(qū)。

考查動詞的時態(tài)。helped一般過去時;will help一般將來時;are helping現(xiàn)在進(jìn)行時;have helped現(xiàn)在完成時。分析句子并結(jié)合題干中的“Look!”可知,此處強(qiáng)調(diào)動作正在發(fā)生,應(yīng)使用現(xiàn)在進(jìn)行時,故選C。

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