No student       go out of school for snacks during the break without the teacher’s permission.

I ______ follow you. Would you please repeat it?

--- I once got lost during my first visit to Beijing.-- Oh, did you? You _______ me as your guide.

Sometimes most of us probably are angry______our friends, parents or teachers. 

—Why can your neighbor know so much about London?—He ____ have been there before.