Перевести в косвенную речь начинать так: they wanted to know

1 They wanted to know why i wanted to study at their school
2 They wanted to know what marks i had had at your school 
3 They wanted to know if i had had any problems with my classmates
4 They wanted to know what books i was reading thaen
5 They wanted to know what my hobbies was
6 They wanted to know if i had needed a special diet
7 They wanted to know if i had had any operations
8 They wanted to know if there were any special things that i wanted to tell them  about myself