— are you going to visit the science museum? —Next Saturday.A. WhenB. WhatC. WhereD. How

问题补充：

— are you going to visit the science museum?

—Next Saturday.

A. When

B. What

C. Where

D. How

答案：

(答案→)A. When

B. What

C. Where

D. How

解析：疑问词辨析。When 什么时候；What什么；Where在哪儿； How怎样。根据答语Next Saturday下周六，可知询问的时间，故用when来提问。选A。