---Would you like to go fishing with me?---Sorry. I have lots of homework ___ _.A. to do B. do C. doing
______ 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.