At first the institute refused to purchase(购买) the experiment instrument but this decisio

问题补充：

At first the institute refused to purchase(购买) the experiment instrument, but this decision was changed.

A. occasionally

B. consequently

C. backwards

D. afterwards

答案：

A. occasionally

B. consequently

C. backwards

(答案→)D. afterwards

解析：考查词义辨析。Occasionally 偶尔，consequently 结果，backwards 向后，afterwards 后来，句意：开始学校拒绝购买食盐器材，但是这个决定后来改变了。所以选D。