You have not yet answered my question I can join in the party tonightA. whetherB. ifC. w

问题补充：

You have not yet answered my question I can join in the party tonight．

A. whether

B. if

C. which

D. that

答案：

(答案→)A. whether

B. if

C. which

D. that

解析：主要测试同位语从句。结合语境可知译文如下：你还没有回答我的问题：今晚我能否加入晚会。所以句子中存在疑问，应该用引导词whether，同时此题还考察了if 和whether的区别之一：whether能用来引导同位语从句，而if不能。