2. 外语
  3. Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for______foods into energy

Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for______foods into energy

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问题 Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for______foods into energy and body maintenance.
选项 A、transforming
B、transferring
C、altering
D、shifting
答案A
解析 根据题意指“把一物变成另一物”。在四个选项中能表达这一意思的只有transform，而且它通常与into连用，如；A steam engine transforms heat into energy．蒸汽机把热变成能。其他三个选项transfer“转移；调动”，alter“改变，变更”，shift“转移，移动；转变”都不能表达这一意思。
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