请翻译以下的8句话，谢啦

1. You should respect those who are elder than you.

2. All the things that can be done have been done.

3. The lady whose bicycle had been stolen went to the police station.

4. Mary is my friend who I have known since my childhood.

5. I have a refrigerator and a set of audio system which I bought from my friend just now.

6. Is this the person whom he has mentioned about?

7. His parents have 3 children among which he is the eldest.

8. There are many reasons why original science was always written in Latin.

1.You should respct those who older than you.
2.Everything to be done has been done.
3.The lady's vichel was stolen and she go the the police's office.
4.Mary has been my friend since we was in the childhood.
5.I have a icebox and a set of stereo，just bought from friends.
6.Is it the man that he mentioned?
7.His parents have three kids and he is the eldest one.
8.There are many reasons for original science to always write in Latin.

1 You should respect elders.
2 All things have done that should do.
3 The lady's car was stolen, and she has been to the police station.
4 Mary is a buddy of mine.
5 I have a refrigerator and a stereo, which just bought from a friend of mine.
6 Is this the man that he ever mentioned?
7 His parents have three children, and he is the eldest one.
8 There are many reasons that original scientific writing in Latin.