问题
选择题
— Oh, this is really a small old town.
— Do you know when it ______? [ ]
A. built
B. was built
C. has built
D. has been built
答案
答案：B
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— Oh, this is really a small old town.
— Do you know when it ______? [ ]
A. built
B. was built
C. has built
D. has been built
答案：B