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1. 다음 글에서 주어진 문장을 넣기에 적당한 곳은?
< Then they fly back to their old home in the spring. >
Some birds travel long distances. ( ① ) They may fly thousands of miles to a winter home. ( ② ) They always return to the same place. ( ③ ) But no one knows how they do it. ( ④ ) Scientists think these birds have some kind of map in their heads. ( ⑤ )
* distance : 거리
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1:1문의
