I'm not sure ______ he is right. ______ he is right, I will follow him. [ ]A. when, IfB. whethe
[ ]
题目简介
I'm not sure ______ he is right. ______ he is right, I will follow him. [ ]A. when, IfB. whethe
题目详情
[ ]
B. whether, Whether
C. if, Whether
D. whether, If
答案