1. b
2. d
3. c
4. b
5. b
6. b
7. b
8. a
9. b
10. c
11. agency
12. buildings
13. invite
14. visitors
15. How long
16. Where is
17. shall we
18. How was
1. b
2. d
3. c
4. b
5. b
6. b
7. b
8. a
9. b
10. c
11. agency
12. buildings
13. invite
14. visitors
15. How long
16. Where is
17. shall we
18. How was