_____ is known to us all is that the 2010 World Expo will take place in Shanghai.
| A．It | B．What | C．As | D．Which |
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
| A．should | B．can | C．must | D．will |
Sir, you ______be sitting in this waiting room. It is for women and children only.
| A．mustn’t | B．can’t | C．won’t | D．needn’t |
Jack _____ yet, otherwise he would have telephoned me.
| A．mustn’t have arrived | B．shouldn’t have arrived |
| C．can’t have arrived | D．needn’t have arrived |
I told Sally how to get here, but perhaps I ____ for her.
| A．had to write it out | B．must have written it out |
| C．should have written it out | D．ought to write it out |
Michael ______ be a policeman, for he is much too short.
| A．needn’t | B．can’t | C．should | D．may |