4. Could I have a cigarette? I seem to of them.
| A．have run out | B．use up | C．run out | D．have used up |
They ___________ for two hours
| A．is working | B．worked | C．have been working | D．had worked |
Taiyuan，a city in North China，was struck by a heavy snowfall last week，________serious traffic problems.
| A．to face | B．faced | C．facing | D．having faced |
It was not until the beginning of the twentieth century________to explore space.
| A．did man begin | B．when man began |
| C．that man began | D．then man began |
A notice was________in order to remind the students of the changed lecture time.
| A．sent up | B．given up |
| C．set up | D．put up |
It took________supplies to construct these energysaving houses. It took brain too.
| A．other than | B．more than |
| C．rather than | D．less than |