读一读，连一连。
 

1 He is colouring at his desk.   ☆      ☆ Talk quietly.

2 She is talking in the library.  ☆      ☆ Keep your desk clean.

3 We are playing a game.       ☆      ☆ Take turns.

4 They are walking on a bridge. ☆      ☆ Work quietly.

5 They are writing in class.     ☆      ☆ Keep to the right.