___ , he cheated in the last exam .

You must know why she got angry this morning, ____ ?

I don’t want to make friends with those people ______ think of themselves first when in trouble.

Oh, Miss Wei. Your skirt looks nice. Is it new? — No, I it since three years ago.

Simon, what do I need to take for the hiking? –You’d better ________ more water than usual. It’s hot today.