【题目】What made them concerned was that the disease was spreading more ____ than expected.
A.obviouslyB.steadilyC.anxiouslyD.rapidly
在线课程【答案】D
【解析】
考查副词词义辨析。句意：令他们担忧的是这种疾病比预期传播得快。A. obviously显而易见地；B. steadily稳定地；C. anxiously焦急地； D. rapidly迅速地。疾病的传播速度是快，quickly意为迅速地，符合题意。故选D项。