中国文化北京大学英语教程课后答案.docx

中国文化北京大学英语教程课后答案 1、It was _____the policeman came_____the parents knew what had happened to their son. [单选题] * A.before…as B. until…when C. not until…that(正确答案) D.until…that 2、You needn’t _______ me. I’m old enough to take care of myself. [单选题] * A. worry about(正确答案) B. write down C. put away D. wak