问题
选择题
She doesn't 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
答案：D
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。
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