问题补充：
－Why did you talk to the teacher after class?
－I didn’t understand during the lecture.
A. the problem did she tell us
B. how did she say
C. that she was talking about
D. what she was teaching
答案：
A. the problem did she tell us
B. how did she say
C. that she was talking about
(答案→)D. what she was teaching
解析：
这题考查宾语从句的语序问题：宾语从句用陈述句语序，排除AB，C项是因为连接词that错误，所以选D，句意是：--我不理解她在讲座时讲的东西。
