Mr.Wong liked to write on the whiteboard with different coloured markers.One day, he forgot to put the cap of a red marker back on after he had used it and stuffed it into his back pocket.

• 王老师喜欢用几种颜色的笔在白板上写字，有一次那支红笔忘记拧上盖子，插在后裤袋，漏出的红墨水把他裤袋染红了一大片。