Mr. Green didn’t understand made his daughter so absent-minded this morning.
A. how that was
B. what was it
C. why it was that
D. what it was that
网友回答
A. how that was
B. what was it
C. why it was that
(答案→)D. what it was that
解析：考查强调句的疑问形式。根据题意可知，宾语从句中缺少主语，故用what引导其强调句，选D。