If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
| A．problems | B．difficulties | C．questions | D．chances |
The captain placed the flag over the boy, leaving only his face __.
| A．uncover | B．uncovered | C．to be cover | D．uncovering |
.He used to __ in the countryside but now he’s got used to ___ in the noisy area.
| A．live…living | B．live..live | C．living…live | D．living….living |
She was so busy that she didn't stop ___ to us.
| A．talk | B．to talk | C．be talking | D．talking |
The workers demanded their pay___.
| A．to rise | B．to raise | C．to be raised | D．to be risen |
John was seen ____ in by the back door, but nobody saw him ___.
| A．to come…to leave | B．come… leave | C．to come… leave | D．come…leaving |