15. Don't worry. I (b) shall be here to help you.
16. Our friends (b) are going to meet us at the airport tonight.
17. (d) We're having a party next Saturday. We've sent out the invitations.
18. I'll tell Anna all the news when (c) I see her.
19. At this time tomorrow (b) we'll be flying over the Atlantic.
20. Where's Robert? (d) Is he having a shower?
21. I (b) do like that coat. It's really nice.
12. I'm very tired. (d) I've driven over four hundred miles today.
13. When Martin (a) had repaired the car, he took it out for a drive.
14. Janet was out of breath because (a) she'd been running.
