5. In our class, when the bell rang and the taacher closed his book, it was a        or everyone to stand up.

My grandma’s after-supper ______ includes: walking the dog in the neighborhood and dancing in the park with many other aged women..

A（n）______ is a person who understand people’s characters.

In my opinion, it was really a great ______ for her to be pleasant to people she didn’t like.

We discussed the high rate of single parent family, and wondered how to explain this ______.