In Each Sentence an animal is concealed. Can you find ?

In each sentence, an animal is concealed.
The first sentence has dog concealed.
Can you find the others?

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

Click here for Answer

1. Dog
2. Gnu
3. Monkey
4. Beaver
5. Bear
6. Lion
7. Camel
8. Cat