Nowadays scientists are working hard to find a best way of treating addictions drugs.A. o

问题补充：

Nowadays，scientists are working hard to find a best way of treating addictions drugs.

A. of

B. in

C. on

D. to

答案：

A. of

B. in

C. on

(答案→)D. to

解析：考查介词搭配。Addiction与介词to连用，表示对…上瘾；该词的形容词短语be addictive to…沉溺于…句意：现在科学家正在努力找到治疗吸毒上瘾的最好的方法。