Swimming alone ____ be ____ dangerous. Do be careful.
In our city, citizens have free _____ to the library, which makes it easy for them to read any book they like.
---They are quiet, aren’t they? --Yes. They are accustomed ______ at meals.
_______ I met him, I thought he was a serious man.
---I think he is taking an active part in social work. ----I agree with you ________.
When a person is ________, talking with others often helps him feel better.