Answer:
I am a busy worker who is a water mammal.
What begins with T ends with T and has T in it?
People need me, yet they give me away every day. What am I?
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
There's not a kingdom on the earth I haven't traveled over and over and though I know not whence my birth yet when I come you know my roar. I through the town do take my flight and through the fields and meadows green and whether it be day or night I neither am nor can be seen.
What did the piece of wood say when he saw the screwdriver and screws approaching?