________isobviousthateveryoneisconcernedaboutthepresent...

問題詳情：

________ 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：很明顯大家都在關注我們目前的環境狀況。It作形式主語。]

知識點：代詞

題型：選擇題