Why ____ you keep troubling your mother with such question while he is busy .
| A．can | B．will | C．would | D．must |
We tried to find a table for seven, but they were all _________.
| A．given away | B．used up | C．taken up | D．kept away |
Without the ____ of my friends, how could my company have lived through the hard times.
| A．admiration | B．assistance | C．admission | D．achievement |
By the time he got up, I ______ for two hours in the factory.
| A．have worked | B．worked | C．was working | D．had been working |
Was it through Mary _____ was working at a high school ____ you got to know Tom?
| A．who; who | B．that; which | C．who; that | D．who; which |
—Do you mind if I open the window?
—________.I feel a bit cold.
| A．Of course not | B．No, please don’t. | C．I’d rather you didn’t | D．Go ahead |