A new college is being built in I can remember was an old factory 20 years agoA. whichB.

问题补充：

A new college is being built in I can remember was an old factory 20 years ago．

A. which

B. where

C. that

D. what

答案：

A. which

B. where

C. that

(答案→)D. what

解析：考查宾语从句，介词in后面接的是宾语从句，宾语从句中缺少主语，I can remember是插入语，what可以做宾语从句的主宾表，句意是：一所新大学正在我记得前是个旧工厂的地方被建。选D。