— How old is the bridge over there? — Oh, it's very old. It _____about eight hundred years ago.
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题目简介
— How old is the bridge over there? — Oh, it's very old. It _____about eight hundred years ago.
题目详情
— Oh, it's very old. It _____ about eight hundred years ago.
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B. is built
C. was building
D. was built
答案