请翻译一下英语必修2P42页第三题的句子，谢谢

1. I'm not quite sure who that book belongs to.
2. Mr Brown came to China in search of a better future.
3. He took apart two old chairs in order to make a sofa.
4. John mentioned the names of a few judges whom he didn't think highly of.
5. There is no doubt that the search for those lost cultural relics will continue.
6. When the two countries were at war, troops of soldiers were sent to the front line to fight.
7. She gave me food and clothes and she didn't ask for anything in return.

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