No sooner ____ to the lab than he set out to do the experiment.A._英语解答

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：192 ℃　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.