— did you visit the Great Wall?— Last Sunday.A. WhereB. WhatC. WhenD. How

问题补充：

— did you visit the Great Wall?

— Last Sunday.

A. Where

B. What

C. When

D. How

答案：

A. Where

B. What

(答案→)C. When

D. How

解析：A. Where在哪里 B. What什么 C. When 何时 D. How怎么样；句意：你什么时候参观长城？上周日。故选C