Решение:
Записываем, где отдыхали дети, основываясь на описании:
- We went to the sea. We swam and took pictures of green trees.
- We went to the mountains. We climbed to the top wearing helmets.
- We went camping. We slept in tents and made a fire.
- We went to the beach. We swam and went surfing.
Ответ: sea, mountains, camping, beach.