问题
选择题
________ London many times, but he knows little about the city.
A．Having been to
B．Though he has been to
C．He has been to
D．He has gone to
答案
答案：C
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________ London many times, but he knows little about the city.
A．Having been to
B．Though he has been to
C．He has been to
D．He has gone to
答案：C