Exercise with 'Must and can't'

Hello!
I use Murphy's book 'English grammar in use' for self-study. Please, correct me ))

1. That restaurant must be very good. It's always full of people.
2. That restaurant can't be very good. It's always empty.
3. I'm sure I gave you the key. You must have it. Have you looked in your bag?
4. You're going on holiday next week. You must be looking forward to it.
5. It rained every day during their holiday, so they can't have had a very nice time.
6. Congratulations on passing your exam. You must be very pleased.
7. You got here very quickly. You can't have walked very fast.
8. Bill and Sue always travel business class, so they can't be short of money.
9. Ted isn't at work last week. He must be ill.
10. Ted wasn't at work last week. He must have been ill.
11. I wonder who that is. It can't be Mary. She's still at work at this time.
12. Sarah knows a lot about films. She must have gone to the cinema a lot.
13. Look. James is putting on his hat and coat. He must be going out.
14. I left my bike outside the house last night and now it is gone. Somebody must have stolen it.
15. Amy was in a very difficult situation when she lost her job. It can't have been easy for her.
16. There is a man walking behind us. He has been walking behind us for the last twenty minutes. He must be following us.
17. The jacket you bought is very good quality. It must have been very expensive.
18. I haven't seen the people next door for ages. They must have gone away.
19. I can't find my umbrella. I must have left it in the restaurant last night.
20. Dave, who is usually very friendly, walked past me without speaking. He can't have seen me.
21. There was a man standing outside the cafe. He must have been waiting for somebody.
22. Luz did the opposite of what I asked her to do. She can't have understood me.
23. When I got back to my car, the door was unlocked. I must have forgotten to lock it.
24. I was woken up in the night by the noise next door. The neighbors must have had a party.
25. The light was red, but the car didn't stop. The driver can't have seen the red light.

Almost perfect ;) 13, 14, 23, and I think one more needed tiny corrections.