No one knows when such a custom first ________. [ ]A. formed B. came into being C. was come into bei

题目简介

No one knows when such a custom first ________. [ ]A. formed B. came into being C. was come into bei

题目详情

No one knows when such a custom first ________.

[     ]

A. formed
B. came into being
C. was come into being
D. was forming
题型:单选题难度:中档来源:吉林省期中题

答案

B

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