这道英语题怎么做We __ out by that time that he _ a spy for a

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这道英语题怎么做
We ______ out by that time that he _____ a spy for a long time.
A. had found;had seen B.had found;was
C.found;had seen D.found;was
答案选A,我看了解析可没看懂一个句子里有两个现在完成时对吗,我一开始选的C

这句话的意思是“到那个时候我们已经知道他已经做间谍很久了”.
by that time完成时态的标志性时间状语,for a long time 同理.而且你的答案写错了,A应该是 had found; had been (不是seen吧)
这句话还可以写成 By that time we had found that he had been a spy for a long time.

这道英语题怎么做We ______ out by that time that he _____ a spy for a we __ out by that time that he__ a thief for a lng time.had We ()(plan) a day out for Nancy at that time By the time that we got there,he was out. 1.We __________out by that time that he_________ a thief for It is ______ that we’d like to go out for a walk. A. a lovel 1.--Shall we go out for a walk tonight?--_____ A.That souds we ____(plan) a day out for Mr Li tomorrow at that time 是填wi 英语填空题练习 It_______ that he has been ill for a long time.A see He made the suggestion that we _____ by train. A．went B．woul He commanded that all the gates___to search for the spy 这道英语题选什么?can you tell me________at that time? A what they we