问题
选择题
Do you know _____ this time yesterday? [ ]
A. who are they waiting
B. who they are waiting for
C. who were they waiting
D. who they were waiting for
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Do you know _____ this time yesterday? [ ]
A. who are they waiting
B. who they are waiting for
C. who were they waiting
D. who they were waiting for
答案：D