It is said that sixty percent of all energy ________ in the world today is being lost as wasted heat.
| A．produced | B．producing |
| C．to produce | D．having produced |
相关试题
Don’t ______ to contact me if you need any more information.
| A．hesitete | B．apologize | C．worry | D．apply |
Come and see me whenever ______.
| A．you are convenient | B．yo u will be convenient |
| C．it will be convenient to you | D．it is convenient to you |
The thought ______ he might fail in the exam worried him a lot.
| A．when | B． which | C．that | D．what |
The noise was so ______ that he was so ______ that he stayed awake the whole night.
| A．disturbing; disturbed | B．disturbed; disturbing; |
| C．disturbing; disturbing | D．disturbed; disturbed |
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