问题
选择题
It was twelve o'clock __________they finished the work.[ ]
A. since
B. which
C. that
D. when
答案
答案：D
搜题请搜索小程序“爱下问搜题”
It was twelve o'clock __________they finished the work.[ ]
A. since
B. which
C. that
D. when
答案：D