I don’t knowmade Gong Li become an outstanding superstar at home and abroad.A. what was it

I don’t know made Gong Li become an outstanding superstar at home and abroad.
A. what was it that
B. what it was that
C. that was it what
D. that it was what

A. what was it that(答案→)B. what it was thatC. that was it whatD. that it was what解析：通过分析句子结构，可知这是一个复合句，其中包括由what引导的一个宾语从句和一个表语从句。宾语从句要用陈述语序，故排除A和C，that 引导宾语从句时无词义，在从句中不作任何成分，这里作主语，故排除D,故选B。

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