问题
选择题
I am not sure _____ he will come here. ______ he comes here, please let me know. [ ]
A. that, When
B. that, If
C. if, Whether
D. whether, When
答案
答案：D
搜题请搜索小程序“爱下问搜题”
I am not sure _____ he will come here. ______ he comes here, please let me know. [ ]
A. that, When
B. that, If
C. if, Whether
D. whether, When
答案：D