This is the school I studied three years ago. A. whereB. whenC. thatD. which

问题补充：

This is the school I studied three years ago.

A. where

B. when

C. that

D. which

答案：

A. where

B. when

(答案→)C. that

D. which

解析：本题修饰名词school是一个定语从句，可用冠词特指，可用关系词that连接，故本题选C。