—Was it in Shanghai, where the World Expo 2010 was held you met Helen?—Yes. We hadn’t se

—Was it in Shanghai, where the World Expo 2010 was held you met Helen?
—Yes. We hadn’t seen each other for about 5 years.
A. where
B. that
C. which
D. who

A. where(答案→)B. thatC. whichD. who解析：考查强调句型。“就是在2010世博会举行之地上海你见到的海伦吗？” “是的，我们五年没见面了。”

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