— There'ssomeone knocking on the door. Who _____it be?
— It must be Mary. She promised to be here at 8：00.
| A．must | B．need | C．shall | D．Can |
They told us it was the second time that the volunteers _______ the nursing home.
| A．visited | B．have visited | C．were visiting | D．had visited |
It keeps raining these days. We doubt _______ the sports meeting will take place as planned.
| A．which | B．that | C．whether | D．when |
President Obama won the 2012 election over Romney and is once more in__ of the White House.
| A．return | B．search | C．relief | D．power |
Mo Yan, ______penname means “Don’t speak”, won the 2012 Nobel Prize in literature.
| A．whose | B．which | C．who | D．what |
To its fans’ disappointment, the popular band _____ because one singer was badly burnt in a fire.
| A．broke up | B．packed up | C．set up | D．blew up |