— Shall Mary come to the concert with us？
－Not_____she has finished her paper．
A.since B.once C．when D．unless
Many a student _____ that mistake before.
A．has made B．have made C．has been made D．had made
My mother is always warning me when I go out, “Don’t get off the bus ____ it is stopping.”
A. until B. before C. while D. after
—Johnson, there’re a lot of chairs over there. Go and fetch ________ for me.
—Why ________ ? Mike is sitting there doing nothing.
A. one; me B. that; not he
C. it; not him D. some; I
---What is the terrible noise ?
----The neighbours________their kitchen.
A.have repairedB. are repairingC. repairedD. will repair
—Why didn’t you put your cellphone in your overcoat pocket?
—I ________, but I was afraid it would be stolen.
A．had putB．putC．would have D．could have
