wag|wagged|wagging

班上那个爱讲笑话的同学总是逗得大家哈哈大笑。

The class ___wag always cracks everyone up with his funny jokes.

妈妈对我摇手指，因为我忘了做作业。

Mom ___wagged her finger at me for forgetting to do my homework.

小狗的尾巴摇来摇去。

The puppy's tail is ___wagging.