问题
选择题
I'm sorry to keep you __________ for me so long.[ ]
A. wait
B. waiting
C. to wait
D. waited
答案
答案：B
搜题请搜索小程序“爱下问搜题”
I'm sorry to keep you __________ for me so long.[ ]
A. wait
B. waiting
C. to wait
D. waited
答案：B