I don’t remember how many years ago State Street began its business in China.A. it was whe

I don’t remember how many years ago State Street began its business in China.
A. it was when
B. it was that
C. was it when
D. was it that

A. it was when(答案→)B. it was thatC. was it whenD. was it that解析：考查强调句。强调句强调特殊疑问词时，其结构为“特殊疑问词+ was + it + that…”，当疑问句变为宾语从句后要用陈述语气，即“连接词+ it + was + that…”，句意：我不记得是多少年前State Street开始在中国做生意的。故B项正确。

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