Can it be in a fast-changing world we don’t know what to teach our children today?A. whic

问题补充：

Can it be in a fast-changing world we don’t know what to teach our children today?

A. which

B. that

C. why

D. since

答案：

A. which

(答案→)B. that

C. why

D. since

解析：考查主语从句，该句陈述句为it can be that in a fast-changing world we don’t know what to teach our children today。It作形式主语。

句意为在一个快速发展的世界，我们不知道该教我们的孩子什么，这可能吗？