Переведите предложения на русский язык,подчеркните в их придаточные предложения,укажите в

Переведите предложения на российский язык,подчеркните в их придаточные предложения,укажите в скобках их вид(определительное иди дополнительное)
1)The lad you have talked to is my sisters friend.
2)I khow he is right.
3)Its a pity you couldnt come.
4)we hope well buy the computer your friend spoke so much about.
5) the teacher says we may ask any questions we like.
6) he was one of the greatest scientists the world had ever known.
7) what is the title of the book you have spoken about with your friend.
8) the molecules every substance consists of are in a state of constant motion.
9) nick said he liked to work in the evening.
10) the scientist you wanted to see has come.
11) it is essential to understand the way the sewing machine works.
12) the letter i sent you was very long.