你在问别人问题之前,你可以有礼貌地说:A.I’m sorry. B. Excuse me. C. Can you help me?
It’s cold ____ Beijing. A. onB. isC. in
It’s 9:45.It’s time ____ music class. A .to B. for C. of
--Do you have a library?--____________. A.Yes, it is.B. Yes, we do.C. No, it isn’t.
My classroom is on the _______floor. A. firstB. oneC. two
That is________classroom. A. meB. my C.I