Scientists are increasely _____ that the earth is getting hotter because of carbon dioxide and other gases.

Mrs White. bought a _____ wallet for her husband.

The government tried its best to _____ the people’s needs, but the people were still not_______. In fact, what the government did was not________. 

When dealing with students, teachers are supposed to adopt _______ and caring approaches, as they are unique young individuals of different personalities. 

Sometimes, the entrance tickets are _____ free of charge from the university．