【题目】At first the institute refused to purchase the experiment instrument, but this decision was ______ changed.
A. occasionally B. consequently
C. backwards D. afterwards
在线课程【答案】D
【解析】考查副词辨析。occasionally偶尔；consequently因此，结果；backwards向后；afterwards后来。句意：开始这个研究院拒绝购买实验器材，但是后来这个决定被改变。故选D。