Решение:
Соединяем начало и конец предложений:
- 1-a: In 1620 a group of people... about a month or two to cross the ocean and reach America.
- 2-b: A hundred people... how to hunt, fish and grow corn by the Indians.
- 3-a: It took the travellers... about a month or two to cross the ocean and reach America.
- 4-b: The Pilgrims were shown... how to hunt, fish and grow corn by the Indians.
- 5-c: Thanksgiving Day is... a day when Americans thank God for their new home.
Ответ: 1-a, 2-b, 3-a, 4-b, 5-c.