After two years’ research, we now have a ____ better understanding of the disease.

It was really a       experience. Afterwards everybody was very       .

Although he sometimes loses his temper, his students like him＿＿＿＿＿for it. 

Many migrant workers,             city life, wouldn’t like to move back to the countryside.

Tired of the president’s _______ speech, the people _____ at the back began to play with their mobile phone.