Brain Teaser Of The Day: Hidden Animals

Example:

In this sentence the word dog is concealed: What shall I do, George?

Can you find the others?

1. Asking nutty questions can be most annoying.
2. A gold key is not a common key.
3. Horace tries in school to be a very good boy.
4. People who drive too fast are likely to be arrested.
5. Did I ever tell you, Bill, I once found a dollar?
6. John came late to his arithmetic class.
7. I enjoy listening to music at night.