问题
选择题
The trouble is ____ we can not find such an expert.
A．why
B．that
C．where
D．/
答案
答案：B
搜题请搜索小程序“爱下问搜题”
The trouble is ____ we can not find such an expert.
A．why
B．that
C．where
D．/
答案：B