You haven’t answered my question I can join in the game tonight.A. ifB. whetherC. whichD.

问题补充：

You haven’t answered my question I can join in the game tonight.

A. if

B. whether

C. which

D. that

答案：

A. if

(答案→)B. whether

C. which

D. that

解析：考查同位语从句。同位语从句Whether I can join in the game tonight解释前面的名词question的内容，question是不确定的内容，所以使用whether引导。