单项选择题

______ , such problems concerning environment protection are not as easy to solve as they look.

A．Speak generally
B．To speak generally
C．Generally speaking
D．General speaking
<上一题 目录 下一题>
热门 试题

单项选择题
I have no idea ______ you are a famous football player.
A．which
B．why
C．what
D．that
相关试题