问题
选择题
I was listening to the music _____ he came in. [ ]
A. when
B. while
C. because
D. until
答案
答案：A
搜题请搜索小程序“爱下问搜题”
I was listening to the music _____ he came in. [ ]
A. when
B. while
C. because
D. until
答案：A