which的用法：
A shop should keep a stock of those goods which sell best.
商店应存有最畅销的货物。
This is the family which is planning to move to the city.
这是要搬进城里的一家。
This is a reason which we must not forget.
这是我们不能忘记的一个原因。
When deep in thought, which he often was, he would forget all around him.
他常常陷入沉思，这时他就会忘掉周围的一切。
He bought a book, which was written by LuXun, and which he decided to give to his friend.
他买了本鲁迅写的书，他决定送给朋友。
whose的用法：
The girl whose hair is golden is from England.
头发金色的那个女孩是英国人。
The house whose doors are green is an office building.
门是绿色的那座房子是办公楼。
I saw a woman whose bag was stolen.
我看见一个包被偷的女人。
They lives in a room whose window opens to the south.
他们住在一间窗户朝南开的房间里。
Mr King,whose legs were badly hurt, was taken to the hospital.
金先生腿受重伤，被送进了医院。