He proved himself a true gentleman and the beauty of his _______ was seen at its best when he worked with others.
The next morning he woke up to find himself _________ with a coat.
She would lend me the money if I promised to ________ within a month.
Water, _____ we cannot live, exists in the form of liquid, gas or solid.
His laziness ___________ his failing in the exam.
As we all know, smoking ___________ people’s health.