–Who is the girl standing over there?
--Well, if you ____ know, her name is Mabel.
A. may B. can C. must D. shall
The world's economic development is not a win-lose game but one in which all ________ be winners.
A. can B. shall C. must D. would
I really ________ thank you enough. It’s been an wonderful day.
A. needn’t B. should C. must D. cannot
According to the newly-made traffic regulation，whoever drives through red light be fined at least 200 dollars．
A．shall B．may C．would D．should
Itbe a good movie—its reviews were very good．
A．can B．should C．might D．need
He was having a meeting；otherwise he over to help us．
A．would have come B．had come
C．should come D．came
