― Have you finished your composition already, Jack?
― Yes. I _____ it within half an hour.
A．have finishedB．finishC．finishedD．will finish
C

試題分析：句意：―杰克，你寫完你的作文了嗎？― 是的，我半個(gè)小時(shí)就完成了。C. finished為一般過(guò)去時(shí)，一般過(guò)去時(shí)也可以表示過(guò)去一段時(shí)間內(nèi)發(fā)生的動(dòng)作。A. have finished是現(xiàn)在完成時(shí);B. finish是一般現(xiàn)在時(shí); D. will finish 是一般將來(lái)時(shí)的謂語(yǔ)動(dòng)詞形式。
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