If we travel a short distance, we had better walk taking a bus.A. instead B.instead of C. take the place of
______ great scientist Qian Xuesen is!
I don’t know when he ______. When he ______, I will let you know.
------Whose shirt is this?------ It _______ be Li Lei’s. It is too big for him.
Stop smoking, _______ you will get better soon.
—How long have you _______________ the motorbike?—For about two weeks.