Attention, please. Sorry to tell you the flight has to be ______because of the heavy snow.
| A．put away | B．put up | C．put off | D．put on |
Do you know Nelson Mandela, _______ was the first black president of South Africa.
| A．which | B．that | C．who | D．whose |
What ______you do if you _______ in Grade 7 now?
| A．could, are | B．would, are | C．could, was | D．would, were |
Mr. Black would rather __________than _________on Christmas eve because of the crazy spray snow fight everywhere.
| A．stay at home, to go out | B．stay at home, go out |
| C．to stay at home, go out | D．to stay at home, to go out |
This CD _______ belong to Bill. It has his name on it.
| A．mustn’t | B．might | C．can’t | D．must |