We should produce less things from raw materials, _____ is growing smaller and smaller.
| A．whose supplies | B．the supply of which |
| C．which supply | D．the supply of whom |
—Have you decided when to leave for Shanghai?
—Yes, we _____ on Friday.
| A．leave |
| B．are leaving |
| C．have left |
| D．leaves |
_____ a trip abroad is certainly good for the old couple, but sometimes it is too much for them.
| A．Having |
| B．Has |
| C．Have |
| D．Had |
It was said that the accident happened _____ midnight, when it was snowing heavily.
| A．on |
| B．in |
| C．during |
| D．at |
In order to complete his work ahead of time, he got up earlier _____.
| A．as usual |
| B．as usually |
| C．than usual |
| D．than usually |
She opened her eyes with a start and was about to cry out _____ she heard her father urgently telling her to keep quiet.
| A．while |
| B．when |
| C．before |
| D．after |