I found ______ possible to answer all the questions within the given time.
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.
After _______ had happened he could not continue to work there.