题目内容：

We think ____ is important that we should keep the balance of nature.A one B.that C.it
亲们 一定要解释的很清楚

优质解答

Cit is important that...这是it放句首的典型的形式主语结构,it指代后面的that we should keep the balance of nature,其实按照正常语序应该是(That we should keep the balance of nature) is important.即括号中的...