More and more people think ____ necessary to let the students tea_英语解答

More and more people think ____ necessary to let the students teach themselves.
是不是用it或it is都可以?

人气：245 ℃　时间：2019-11-04 08:33:17

解答

用it的话,it是形式宾语
用it is的话,后面的就是think的宾语从句