问题
选择题
Is it the fact ____ he hasn't turned in his research report?[ ]
A. whether
B. that
C. which
D. why
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Is it the fact ____ he hasn't turned in his research report?[ ]
A. whether
B. that
C. which
D. why
答案：B