2. 外语
  3. Doctors generally agree that such factors as cigarette smoking, eating rich foods high in fats, and alcohol consumption not only

Doctors generally agree that such factors as cigarette smoking, eating rich foods high in fats, and alcohol consumption not only

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问题 Doctors generally agree that such factors as cigarette smoking, eating rich foods high in fats, and alcohol consumption not only do damage by themselves but also aggravate genetic predispositions toward certain diseases.
选项 A、not only do damage by themselves but also aggravate
B、do damage by themselves but also are aggravating to
C、are damaging by themselves but also are aggravating
D、not only do damage by themselves, they are also aggravating to
E、are doing damage by themselves, and they are also aggravating
答案A
解析 句意表明that从句的内容是一个普遍规律，因而划线部分应用一般现在时态。注意：by themselves无任何被动含义，在这里指“就它们(such factors)自身而言”。
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