Only_______ stand-up comedians have become famous as television and film actors later on in life._______ person is Billy Crystal.
Everything went on as usual ______ nothing had happened.
A thief slipped into the room without ______.
. The happy look on his face suggested that he ________the final examination successfully.
I would have come sooner but I ________ that they were waiting.
___________ we should do to protect wildlife?