问题
选择题
Once _____, the song will never be forgotten. [ ]
A. it heard
B. hearing
C. heard
D. to hear
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Once _____, the song will never be forgotten. [ ]
A. it heard
B. hearing
C. heard
D. to hear
答案：C