No sooner ____ to the lab than he set out to do the experiment.
A.did he get B.had he got
并说明原因谢谢
人气:409 ℃ 时间:2020-06-24 17:32:43
解答
B
回到lab这个动作发生在做实验之前,而做实验是过去做,故为过去完成时.
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