—Could you help me change the wheel，sir?
—______，madam，which one?
| A．With pleasure | B．Sorry，I can't | C．It's a pleasure | D．Just a minute |
With the help of __________ people, I can be more successful in volunteer work.
| A．serious | B．generous | C．nervous | D．dangerous |
—I’m going to see John tomorrow.
—Don’t tell him the result of his medical examination when you __________ to him.
| A．talk | B．have talked | C．will talk | D．talked |
People around the country were excited __________ the astronauts came back to the earth safely.
| A．unless | B．but | C．until | D．because |
—I’ll call Bob and tell him the good news.
—You __________ do that. He was here just now and heard it.
| A．couldn’t | B．mustn’t | C．shouldn’t | D．needn’t |
Susan __________ for our newspaper any more. She has been hired by a fashion magazine.
| A．doesn’t work | B．wouldn’t work | C．didn’t work | D．hadn’t worked |