那个顽皮的男孩把老师的粉笔藏了起来，惹得全班大笑。

The ___prankish boy hid the teacher's chalk, making the whole class laugh.

孩子们顽皮地把老师的椅子换成了一个充气玩具。

The kids replaced the teacher's chair with an inflatable toy in a ___prankish manner.