Again as __________ in this experiment,

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问题 Again as __________ in this experiment, he didn′ t lose heart.A.he failedB.did he failC.he did failD.had he failed

选项 A.he failed

B.did he fail

C.he did fail

D.had he failed

答案 A

解析 考查让步状语从句。as/though引导的让步从句必须将表语或状语提前(形容词,副词,分词,实义动词提前)。但需注意:①句首名词不能带任何冠词。②句首是实义动词,其他助动词放在主语后。如果实义动词有宾语和状语,与实义动词一起放在主语之前。句意为“在这次实验中,他又一次失败了,但是他从未失去信心”。故选A。
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