2. 专升本
  3. A great many cancers can be cured but only if ______ before they have begun to spread or ’colonize’ in other parts of the body.

A great many cancers can be cured but only if ______ before they have begun to spread or ’colonize’ in other parts of the body.

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问题 A great many cancers can be cured but only if ______ before they have begun to spread or ’colonize’ in other parts of the body.
选项 A、properly treat
B、properly treating
C、being properly treated
D、properly treated
答案D
解析 此为从句if they are properly treated的缩略形式。
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