题目

—Do you like Bowen?--Of course. He’s very kind and smart. He can finish his homework ___ and help us with our study every day.A. usually B. late C. hardly D. quickly 答案：【答案】D【解析】句意：——你喜欢鲍文吗？——当然。他既善良又聪明。他能很快完成作业，并且每天帮助我们学习。考查副词辨析题。usually通常；late晚地；hardly困难地；quickly快速地。and连接并列结构，根据下文and help us with our study every day.，可知他做作业很快，故选D。若实数x，y满足，则的取值范围是