【题目】The doctor thought the medicine was perfect，but it didn't ________the disease at all.
A．work out
B．solve
C．do
D．have an effect on
在线课程【答案】D
【解析】work out意为“解出；解决”；solve意为“解决”；do意为“做；可以；行”；have an effect on意为“对……有影响；对……起作用”。根据句意应选D项，表示“对这病根本不起作用”。