老师用彩色粉笔在黑板上画了一幅风景画。

The ___teacher drew a landscape on the blackboard with colorful chalks.

那位采石工人每天都要在石灰矿里工作十个小时。

The ___worker works ten hours a day in the chalk quarry.

这位举重运动员是个细心的打粉人，每次试举前都会仔细涂抹镁粉。

The weightlifter is a careful ___chalker, applying magnesium powder thoroughly before each lift.