2. 考研
  3. Whenever work is being done, energy______from one form into another.

Whenever work is being done, energy______from one form into another.

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问题 Whenever work is being done, energy______from one form into another.
选项 A、converts
B、converted
C、is converted
D、is being converted
答案C
解析 本句空格处意为“能量从一种形式转变成另一种形式”。convert意为“转变；变换”，如：That building has been converted into a school．(那座楼房改成学校了)。根据题意应用被动语句，所以答案为C。
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考研英语一

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