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 |
相关试题
The speaker raised his voice but still couldn’t make himself ______.
| A．heard | B．to hear | C．hearing | D．he ar |
You ____ television．Why not do something more active?
| A．always watch | B．are always watching |
| C．have always watched | D．have always been watching |
She is my best teacher ______ help I have made great progress．
| A．with whom | B．whose | C．which | D．with whose |
E-mail, as well as telephones, ___ an important part in daily communication.
| A．have played | B．is playing | C．are playing | D．play |
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