-----What has made him upset recently?-----_______ alone to face a troublesome milk case.

Clothes are just a ________ of money, but one’s real life value lies in his knowledge, morality and quality.

It _____ to the airport.

It is not enough to have ____ for the disabled. We should learn to respect them and help them understand their valuable roles in society.

All the traveling ______ are paid by the company if you travel on business.