1·The boxes contain red, blue and white chalks .
盒子里有红、蓝和白三种颜色的粉笔。
2·They were drawing patterns on the blackboard in colored chalks.
他们用彩色粉笔在黑板上画图案。
3·I have a blackboard and many chalks.
我有一块黑板和很多粉笔。
4·Please take the empty box away and bring me some chalks.
请把这个空盒子拿走，帮我拿些粉笔来。
5·Chalks are used to write on the blackboard.
粉笔是用来在黑板上写字的。