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If a computer crashes, you will lose the file you _________unless you save it regularly.
| A．are working | B．work | C．will work | D．worked |
The first satellite ____telephone signals was called Early Bird.
| A．was used to send | B．used to be sent |
| C．was used to sending | D．used to send |
How is he now? Is he slowly ____?
| A．getting up | B．coming up |
| C．picking up | D．rising up |
I’ll be going to work on foot while my bicycle_____.
| A．is being repaired | B．is repaired |
| C．will repaired | D．has been repaired |
_____ the watch and see if you can find out what’s wrong with it.
| A．Pack up | B．Break down |
| C．Dig out | D．Take apart |
For some students, the computer serves only _____ a tool that is used to play games.
| A．of | B．in | C．as | D．to |