If anyone happens to drop in while I am out, _________ him or her leave a message.
It __________ that the football match ________ put off because of the weather.
Only in this way __ to make improvement in your study.
His parents showed no signs of _______ to his demands.
The house had been out of condition for years, so they decided to ___________.
The reason ________ he was late for the meeting was _______ his car had broken down on the road.