1. Susan got many postcards on St. Valentine's Day.
2. They invited many quests for a party last week .
3. The pupils of our class dacorated the school assembly hall with balloons yesterday.
4. Steve and Alex has already drown a wall newspaper to greet their teachers on New Year's Day.Я бы тут вжил Present Perfect .
5. Our class made wonderful decorations last month.
6. We sent Easter postcards to our relatives two days ago.