请英语老师或英语专业的给出解释,

请英语老师或英语专业的给出解释,§5.Many lifestyle pattems do such _ great harm to health that they actually speed up _ weakening of the human body.§A.a;/ B./;the C.a; the D./;/ §5．B do harm to...为固定短语,意为“对……有害”；第二空为特指的用法,即特指体质变弱,故用定冠词the为什么此题中such后面不加a