问题
选择题
He is the only person who saw the accident ______. So he is the most important witness.[ ]
A. happen
B. to happen
C. having happened
D. happened
答案
答案：A
搜题请搜索小程序“爱下问搜题”
He is the only person who saw the accident ______. So he is the most important witness.[ ]
A. happen
B. to happen
C. having happened
D. happened
答案：A
