In my opinion,it is possible for you to find some real good friends with the help of new technology but you (28) ______
问题描述：
In my opinion,it is possible for you to find some real good friends with the help of new technology but you (28) ______ ______ take care.When you talk with someone unknown on the Internet,you have no idea at all what kind of person he is and (29) ______ he is telling you the truth.
28.have to/ ought to 29.whether/ if
帮我分析一下他的语法谢谢!
答
It is adj for sb to do sth. 固定句式 it 作形式主语
When 引导的时间状语从句.
否定句和疑问句时,用whether.