【題目】They won't leave school until they ______ their homework.

A. finishB. finishes

C. finishedD. will finish

【答案】A

【解析】

句意:直到他們完成作業(yè)才會(huì)離開(kāi)學(xué)校。

根據(jù)until引導(dǎo)的時(shí)間狀語(yǔ)從句不用將來(lái)時(shí)態(tài),用一般現(xiàn)在時(shí)態(tài)來(lái)代替,主語(yǔ)they,謂語(yǔ)動(dòng)詞用原形;finish 動(dòng)詞原形,finishes 單數(shù)形式,finished 過(guò)去式,will finish 將來(lái)時(shí)態(tài)的結(jié)構(gòu);故選A。

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