She doesnt know made her daughter so sad this morning.A. what was itB. why it was thatC.

问题补充：

She doesn know made her daughter so sad this morning.

A. what was it

B. why it was that

C. how that was

D. what it was that

答案：

A. what was it

B. why it was that

C. how that was

(答案→)D. what it was that

解析：强调句的特殊疑问句用作宾语从句时用陈述语序宾语从句缺主语故用what 引导。