Sound travels ______ air ______ a speed of about 340 metres per second.
| A．over; in | B．through; at | C．by; at | D．through; over |
It's bad for your eyes _____computer games too much.
| A．plays | B．to play |
| C．play | D．to playing |
There _____ a football match on TV at nine tomorrow evening.
| A．will have | B．is |
| C．is going to be | D．are going to be |
If Allen ____ to the party, he'll have a good time.
| A．go | B．goes | C．will go | D．went |
We couldn't see the road clearly _____ the heavy snow.
| A．because | B．but |
| C．though | D．because of |
---_______does your mother watch talk shows?
--- Once a week.
| A．How long | B．How often |
| C．How many | D．How much |