1. Use the signs to complete the exchanges.

Okay, let's complete the exchanges using the given signs: 1. A: Are you excited about going to the museum, Tim? B: Oh yes, Mum! Let's go. A: Wait a minute. We're not going anywhere until you **fasten your seat belts**. 2. A: Why are you slowing down, Dad? B: I have to. Don't you see the lights flashing at the **railroad crossing** up there? 3. A: Who is it? B: It's the maid, Sir. May I clean the room now? A: No, I'm busy. Can't you see the **do not disturb** sign on the door? 4. A: Okay, class, come this way now. B: Look, miss, there are some rabbits! Can we pet them? A: Yes, but remember you're not allowed to **feed the animals** them. 5. A: Did everyone enjoy the picnic? B: I did. It was wonderful. A: Good. Now I want everyone to pick up all the **litter** and put it in the **place litter in bins** over there.