나름대로 해석은 되지만, 최대한 자연스러운 해석이 뭔지 궁금합니다. ㅠ
부탁드려요. ^^

1. Ivory can be stored so that it does not deteriorate, and the large quantities taken by former hunters have provided stores of ivory.
상아는 훼손되지 않도록 저장될 수 있어서, ... 그 다음을 모르겠네요.

2. Travellers have reported that as late as 1863 Iceland had only one school.

3. The mild winters, good pasturage all year, and plenty of water in the blugrass region make the state a good place for stock raising. ~로 만들었다 말고 다른 해석은 없을까요 ㅠ 더 자연스럽게...

4. The ships were able to go to the aid of sinking ships and save many lives.

5. A parole from prison is granted by a parole board under the condition that the paroled convict report at stated regular intervals to a person appointed by the board.
(저의 해석) 가석방 위원회에서 승인된 죄수들은, 그 위원회가 지명한 사람에게 일정한 간격으로 보고되는 하에 가석방을 승인받는다.
더 좋은 해석 없을까요?

6. Christopher Columbus returned home, having explored much of the New World to open the way for settlement.

7. Kildeers spend the winter as for south as Peru.