问题
选择题
No one knows when such a custom first ________. [ ]
A. formed
B. came into being
C. was come into being
D. was forming
答案
答案：B
搜题请搜索小程序“爱下问搜题”
No one knows when such a custom first ________. [ ]
A. formed
B. came into being
C. was come into being
D. was forming
答案：B