— did you leave the classroom?
— I saw my daughter sit down and read her book.
A. How long; After
B. When; Until
C. How long; Until
D. When; After
网友回答
A. How long; After
B. When; Until
C. How long; Until
(答案→)D. When; After
解析：根据题干可知，第一句询问“你什么时候离开的教室？”答语是“我看到我女儿坐下读书后”，故选D.