单项选择题

______ for your help, we never have been able to overcome the difficulties.

A．Had it not
B．If it were not
C．Had it not been
D．If we had not been
<上一题 目录 下一题>
热门 试题

单项选择题
I am sorry that you ______ do such a thing
A．would
B．can
C．should
D．may
相关试题