There is a mistake in each of these sentence. Find the mistakes and correct them.
1. I usually have a brad for breakfast. 2. Being a waiter is often a very hard work. 3. Cutting down on sweet things is a good advice. 4. Drinking coffee alweys gives me terrible headache. 5. I've taken your blood pressure and I'm afraid the news aren't good. 6. I would like a sanwich with a chicken and mayonnaise in it, please. 7. We didn't have any furnitures, so we ate dinner sitting on the floor.