Question

by the time前后时态

we ___ out by that time that he ____ a thief for a long time.
A. had found, had been B. had found, was
C. found, had been D. found was

选择哪个呢？many thanks

Answer 1

C
后半句for a long time表示过去状态的延续，需用完成时态，而前半句不可，选A不能区分时间的先后

Answer 2

we FOUND out by that time that he HAD BEEN a thief for a long time.

Answer 3

a

Answer 4

C