小狗看到食物时兴奋地摇着尾巴。

The puppy excitedly ___wags its tail when it sees food.

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.

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.