Do you have any idea ______ on earth has

问题选择题

Do you have any idea ______ on earth has happened to our friend?

A．that

B．what

C．as

D．which

答案

答案：B

考查同位语从句。what on earth has happened to our friend是一个同位语从句解释前面的idea, what在句中做主语。句意：你知道我们的朋友究竟发生了什么事情了吗？