Some countries are increasing their use of natural gas, and other forms of __________.
| A．source | B．energy | C．power | D．material |
The time he has devoted in the past years _______ the homeless is now considered _________ of great value.
| A．to help; being | B．to helping; to be | C．to help; to be | D．helping; being |
--- Sweetheart! You will never believe this. I just won a car!
---________! I don’t believe it!
| A．Cheer up | B．Good work | C．Good Heavens | D．That’s awful. |
It is said the factory is now __________ large as what it was.
| A．twice as | B．as twice | C．twice much | D．much twice |
An excellent teacher is believed to be one who cares about his students but asks for nothing __________.
| A．in turn | B．in short | C．in return | D．in general |
When residents learned on Wednesday that only one of the 13 workers trapped underground _________, they burst into tears.
| A．had saved | B．had rescued | C．had died | D．had survived |