问题
选择题
_____ to reach them on the phone, we sent an email instead. [ ]
A. Fail
B. Failed
C. To fail
D. Having failed
答案
答案：D
搜题请搜索小程序“爱下问搜题”
_____ to reach them on the phone, we sent an email instead. [ ]
A. Fail
B. Failed
C. To fail
D. Having failed
答案：D