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 |
He didn’t make ______ clear when and where the meeting would be held.
| A．this | B．that | C．it | D．these |
It was raining heavily. They could do nothing but ______ at home.
| A．to stay | B．stay | C．stayed | D．staying |
The boss went into the house ,_______ the five boys _______ in the rain.
| A．left, standing | B．leaving , standing |
| C．left ,stand | D．leaving , stand |
I don’t think he _______ a new bike.
| A．need to buy | B．needs buying |
| C．need | D．need buy |
-----Would you like to go mountain-climbing with us ?
----- Thanks, but that’s the ______ thing in the world I’d like to do.
| A．latest | B．very | C．worst | D．last |