Many lifestyle patterns do such great harm to health that they actually speed up weaken

问题补充：

Many lifestyle patterns do such great harm to health that they actually speed up weakening of the human body.

A. a; 不填

B. 不填; the

C. a; the

D. 不填；不填

答案：

A. a; 不填

(答案→)B. 不填; the

C. a; the

D. 不填；不填

解析：句意：许多生活方式对人类的健康有害，他们加速了人类身体的衰退。。“对……有害”用短语“do harm to”表示，中间无需冠词；之后的weakening是由动词的动名词形式表示抽象的名词，表达一种概念、状况时需要加上the，故选B。