___is very important ___the envioronment around us A this to prot_英语解答

___is very important ___the envioronment around us A this to protect B it to protect
C that protecting D it protecting

人气：215 ℃　时间：2020-03-23 09:44:56

解答

答案：B
it在句中作形式主语,动词不定式作真正的主语.