问题
选择题
_________ happened to be no one in the building when the fire broke out. [ ]
A. It
B. There
C. This
D. That
答案
答案：B
搜题请搜索小程序“爱下问搜题”
_________ happened to be no one in the building when the fire broke out. [ ]
A. It
B. There
C. This
D. That
答案：B
