单选题The chemistry class _____ for five minutes when we hurried there.Ahad been onBwas onChas been onDwould be on

单选题
The chemistry class _____ for five minutes when we hurried there.
A

had been on

B

was on

C

has been on

D

would be on


参考解析

解析:
句意:我们赶到的时候,化学课已经开始5分钟了。“开始5分钟”应该在“赶到”动作之前,也就是过去的过去,应该用过去完成时,故为A。

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