Question

.---____ 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

Answer 1

D               

             
试题分析：考查特殊疑问词与连词。句意;你什么时候离开教室？当我看到女儿坐下学习后。How long多长；until 直到；根据下方提到I saw my daughter sit down and read her book.不是表示时间长度，再根据前后句意匹配来说，所以选D项。