Use the Modals and the Perfect Infinitives of the verbs in the list.

1. A: She's really late. B: She must have missed the bus.
2. A: I'm really tired today. B: You must have gone to bed early last night.
3. A: You must have done the washing up. It was my turn. B: That's all right. I didn't mind.
4. A: Bye. See you later. B: Where are you going? You must have finished your homework already!
5. A: What are you looking for? B: My gloves. I must have left them somewhere.