What Am I?

I unlock your door.What am I?I am a key.

I light your room.What am I?I am a lamp.

I clean your room.What am I?I am a vacuum cleaner.

I keep your food.What am I?I am a refrigerator.

I make tasty toast.What am I?I am a toaster.

I bake yummy cookies.What am I?Iam an oven.