The cancer risks _______ with smoking have been well proved.
| A．combined | B．related |
| C．associated | D．caused |
We are all for your suggestion that the meeting _________.
| A．be put off | B．was put off |
| C．should put off | D．is to put off |
—The experiment had failed. —I suggest you _________ again.
| A．try | B．trying |
| C．will try | D．would try |
—Tom was late for the meeting.
—_________ As far as I know, he set out very early.
| A．Go on. | B．How come? |
| C．Why not? | D．No problem, |
It is a _________ in China to have some tea or other drinks before the meal is served.
| A．custom | B．behavior |
| C．policy | D．system |
The two birds _________ each other in shape and color. In otherwords, they _________ each other in shape and color.
| A．differ, are different from |
| B．differ from, are different to |
| C．resemble, are similar to |
| D．resemble, are similar with |