________isobviousthateveryoneisconcernedaboutthepresent...

问题详情：

________ is obvious that everyone is concerned about the present situation of our environment.

A．There  B．This  C．It  D．What

【回答】

C　[句意：很明显大家都在关注我们目前的环境状况。It作形式主语。]

知识点：代词

题型：选择题