activities in class的用法和样例：
- We must discuss the class activities in a body.
- Me too. My English teacher is excellent in interacting with us in class. She always gives us lots of different activities in class.
- Students exchange activities by network Students exchange E-mail address and build up E-mail contact to make video network communication activities in class.
- She got cold feet when asked to recite in class.
- She was kept in for an hour for talking in class.