—What do you think of your neighbor?—He’s so_________ that he likes to meet and talk to new people.

lin Fang comes home ________ than before this term. She doesn’t have so many classes in the afternoon.

You are under 18 years old, so it is        for you to join the Trailwalker.

A: _____is Mary?B: I think she is at home．

Now the air in our city is _______ than it used to be. Something must be done to stop it.