当被问及如何解决交通拥堵时，他开玩笑地建议把道路都改成滑梯。

When asked how to solve traffic jams, he ___facetiously suggested turning all roads into slides.

当老师问谁打破了窗户时，他嬉皮笑脸地举手回答。

When the teacher asked who broke the window, he raised his hand and answered ___facetiously.