问题描述：
Hangzhou, _____ we paid a visit last spring, is one of the most beautiful cities in China.
A. which B. where C. to there D. from which
P.S: 必须有解析.
答案是D ，为什么？
A. which B. where C. to there D. from which
P.S: 必须有解析.
答案是D ，为什么？
问题解答：
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