问题
选择题
Do you know when the Great Wall _______?[ ]
A. was come into being
B. came into being
C. had come into being
D. had been come into being
答案
答案：B
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Do you know when the Great Wall _______?[ ]
A. was come into being
B. came into being
C. had come into being
D. had been come into being
答案：B