The kind-hearted couple decided to adopt the boy ____ parents had been killed in an accident.
It was when she was about to go to bed ______ the telephone rang.
None knows if _______ that boy, but if _______ him, her parents will be disappointed.
The problem is _____ has caused us a lot of trouble.
He pointed to ______ looked like a tomb and said, “Ghost.”
. We are living in an age ______ many things are done on computer.