_______ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
| A．Since | B．As | C．With | D．For |
His pale face suggested that he _________ frightened.
| A．be | B．was |
| C．would be | D．were |
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 |