Решение:
- Bill's teacher is from Great Britain.
- This businessman is from a Zoo at the United States.
- Let's go to the Zoo at the United States.
- Do you celebrate Christmas?
- They had a party on the first of January.
- I saw Sam's parents on the second of October.
- I saw Ted's cousin at the end of April.
- Harry's uncle was in the United States last Christmas.
- We celebrate Easter in spring.
- What was the weather like last month?
Ответ: 1. Great; 2. a, the; 3. the, the; 4. Christmas; 5. a, the, January; 6. Sam's, the, October; 7. Ted's, the, April; 8. the, last; 9. Easter, spring; 10. the, last.