问题
选择题
Though ____ many times, the song still sounds as nice as before
A．it was heard
B．hearing
C．heard
D．to be heard
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Though ____ many times, the song still sounds as nice as before
A．it was heard
B．hearing
C．heard
D．to be heard
答案：C