In America, if__________friend has invited you to drop by anytime, it is__________best to call before visiting to make sure it is convenient for him.
| A．a; a | B．a; 不填 | C．the; a | D．the; 不填 |
The prize will go to the writer __________ story shows the most imagination.
| A．that | B．which | C．whose | D．what |
—Smoking is bad for your health.
—Yes, I know. But I simplycan't __________.
| A．give it up | B．give it in | C．give it out | D．give it away |
__________ in the mountains for a week, the two students were finally saved by the local police.
| A．Having lost | B．Lost | C．Being lost | D．Losing |
Elephants would __________ soon if man was allowed to shoot as many as they wish.
| A．die out | B．die off | C．die away | D．die down |
He hasn't slept at all for three days. __________ he is tired out.
| A．There is no point |
| B．There is no need |
| C．It is no wonder |
| D．It is no way |