I'm sorry I keep you ____ (wait)so long.
I'm sorry to keep you_______(wait)so long
I'm sorry to keep you___ so long.A.wait B.so wait C.waiting
I'm sorry to keep you waiting so long
I'm sorry ( ) you working so long.(keep)
I’m sorry to keep you _(wait) for a long time 适当形式
i'm sorry to keep you ----(wait) for a long time
.I'm sorry to keep you ___ for a long time.A.to wait B.waiti
I'm sorry.I have kept you ()for me so long.A:wait B:waiting
I am sorry I _____(keep)you waiting so long.
一道英语动词填空I'm sorry for having you ____________(wait)so long.
i'm sorry you had to wait so long的中文意思
英语改错 “I'm sorry to have kept you to wait for so long”