问题
选择题
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
答案：D
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。