Science and technology have ___A_____ in important ways to the im_英语解答

Science and technology have ___A_____ in important ways to the improvement o
A) attached
B) assisted
C) contributed
D) witnessed
为什么不能选A?

人气：401 ℃　时间：2020-06-16 03:28:40

解答

C) contributed
v.有助于,贡献（contribute的过去分词）
adj.贡献的,分配的；已缴入的