Happy Occasions

1)They've been married for 50 years and they're going to ........ the occasion with a huge family party.

a) signal
b) show
c) mark

2)It's a red-........ day for the school as they've had a record number of students passing their exams!

a) letter
b) flag
c) carpet

3)Are you going to lay ........ a party for your daughter's 21st birthday?

a) in
b) on
c) out