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

A great many cancers can be cured but only if______ before they have begun 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 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 很多癌症是可以治愈的，只要在癌细胞扩散到身体其他地方之前被正确的治疗。Only if引导的条件从句，从句的主语与主句相同被省略，意思表示被动，也省略了be动词，形成独立结构。而C项表示正在发生的事情。
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