【題目】David can't go with us now because he __________ the school project.

A.doesB.has doneC.didD.is doing

【答案】D

【解析】

句意:大衛(wèi)現(xiàn)在不能跟我們一起走,因為他正在做學校的項目。

考查動詞時態(tài)辨析。does 一般現(xiàn)在時;has done 現(xiàn)在完成時;did 一般過去時;is doing 現(xiàn)在進行時。根據(jù)句中now可知,句子表示現(xiàn)在正在進行的動作,所以用現(xiàn)在進行時,結(jié)構(gòu)為be doing,主語he是第三人稱,所以beis。故選D。

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