a pet dog的用法和样例：
- He grew up with a pet dog named Don.
- A pet dog is never killed by its owner.
- It was once against the law to have a pet dog in a city in Iceland!
- I have a pet dog named Maximus, and a bird named Vanilla.
- He grew up with a pet dog named Don.Wherever he went,Don went with him.
a pet dog的相关资料：