The manager told us that this factory ________ in 1958.

题目

The manager told us that this factory ________ in 1958.
A.was built B.had built
C.had been built D.had been set up
请作出分析,越祥细越好.

答案

A was built
有具体的时间：in 1958.肯定是用过去时
其他都不对.