We will ______ all the natural resources if we continue consuming them like that.
| A．run out | B．wipe out | C．drop out | D．hold out |
I insisted that a doctor _________ immediately.
| A．has been sent for | B．sends for |
| C．will be sent for | D．be sent 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, |