问题
选择题
I don't know _______ he will come or not tomorrow. _______ he comes, I will tell you.
[ ]
A. if, Whether
B. whether, Whether
C. if, If
D. whether, If
答案
答案：D
搜题请搜索小程序“爱下问搜题”
I don't know _______ he will come or not tomorrow. _______ he comes, I will tell you.
[ ]
A. if, Whether
B. whether, Whether
C. if, If
D. whether, If
答案：D