No sooner ____ to the lab than he set out to do the experiment.
问题描述:
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
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.