There will be a stamp show in the museum we visited last week.A. who B. whenC. whichD. wh

问题补充：

There will be a stamp show in the museum we visited last week.

A. who

B. when

C. which

D. what

答案：

A. who

B. when

(答案→)C. which

D. what

解析：关系代词的用法。 此处先行词是museum，是事物，应该用关系代词which替代museum。