If they _______ the contract ahead of time,they could not have missed the plan.
If they _______ the contract ahead of time,they could not have missed the plan.
A signed
B had signed
C would have signed
D should sign
选哪一个?
A signed
B had signed
C would have signed
D should sign
选哪一个?
英语人气：672 ℃时间：2019-11-24 17:42:10
优质解答
B 虚拟语气,根据后边一句说明这里是过去完成时虚拟语气的考察
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