Question

1.We __________out by that time that he_________ a thief for

Answer 1

这个主要因为语序的问题：

We _____ found____out that he___had been ______ a thief for a longtime by that time .

A.had found,had been B.had found,was

C.had been D.found,was

译文：我们发现他到那时已经做了一段时间的小偷了.

（到那时是修饰从句的,而不是到那时发现这个动作）

参考：by that time 到那时;节止那个时候 一般与完成时连用.

We had learned 5000 words by that time when we graduated.