The poor boy could do nothing but ___ at the corner of the street.
| A．to sit | B．sitting | C．sit | D．sat |
To enjoy the scenery, Irene would rather spend long hours on the train ___travel by air.
| A．as | B．to | C．than | D．while |
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 |