Tìm lỗi sai sửa và giải thích

Tìm lỗi sai xửa và giải thích 
1. different kinds of newspapers are arranged on the shelves when the teacher came into the class
2. it took us  three days    repainting our house
3.like many children in this club,that boy is keen of making models
4. A new shop was opening on Main Street at 9a.m. last Monday
5. her car is very old. It needs to repair
6. a young can have the future in their hands
7.with whom did you go? will your go by yourself