When I try to find _______ that prevents so many people from taking part in the program,it seems to me that there are two main causes.
I’ve just seen no more than one copy of“ Gone with the Wind”in the bookshop opposite. Tom, go and buy ________ back.
Carol said that the work would be well done by the end of October, ________ personally I wondered completely.
The boy said ________ couldn’t he work out the problem but his teacher didn’t know how to do it.
She will have to find some other work for she can’t ________ this loud noise any more.
— Why weren't you at the meeting? — I ________ for a long distance call from my sister in America.