It was a real race________time to get the project done.Luckily，we made it.
| A．over | B．by |
| C．for | D．against |
Someone called me up in the middle of the night, but they hung up _____ I could answer the phone.
| A．before | B．as | C．since | D．until |
--- May I go and play with Tom this afternoon, Mum?
---No. You can't go out _____ your homework is being done.
| A．until | B．since | C．before | D．if |
The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this.
| A．therefore | B．and | C．then | D．but |
.Is it true ______ the rain stops , it will be as hot as in the summer here?
| A．when | B．that when | C．whenever | D．that |
.---_____ I watch TV, I’ll turn it down and never make any noise.
--- Good. ______ you are doing should never disturb others. _______ how important you are,never forget about how others feel.
| A．Whatever; Whenever; No matter | B．Whenever; Whatever; No matter |
| C．Whether; Whatever; 不填 | D．No matter; Whenever; 不填 |