64. 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. (A) not only do damage by themselves but also aggravate (正确答案) (B) do damage by themselves but also are aggravating to
og对于B的解释:B Are aggravating to is not parallel to do damage; 请问哪里不平行了?我觉得是平行的啊 !
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