Answer:
11 We ARE going to the game tonight
12. You ARE
going to buy me a Christmas gift.
13. They
ARE a good group of students to take on a field trip
14. She IS
the one who organized the birthday party.
15. The three players ARE
friends
16. The crowd IS
very loud.
17. The students ARE
happy
18. The day IS
perfect for soccer
19. Mr Johnny a IS teacher
20. I AM
going to SM