问题
选择题
He disappeared last month, _____ we have heard nothing of him. [ ]
A. when
B. after which
C. from which
D. since when
答案
答案：D
搜题请搜索小程序“爱下问搜题”
He disappeared last month, _____ we have heard nothing of him. [ ]
A. when
B. after which
C. from which
D. since when
答案：D