He was in hospital for six months. He felt as if he was ________ from the outside world.

A study shows that people living in non-smoking areas are less likely to ________the habit of smoking．                       

We want to rent a bus which can________40 people for our trip to Beijing.

The speaker _______ at the audience and then began to make his speech. 

Cynthia is not ashamed of what she does, even if she        doing something wrong.