Which basketball player do you like best, Kobe, James or Jordan? — _______ of them .Lin shuhao is my favorite.

It’s _______ to work out the math problem. You needn’t go to ask the teacher.

She learned to playpiano all by herself.

Are Mr. and Mrs. Wang living alone in the house? —Yes, they have three sons, but ______ of them live in their own houses.

While I was cleaning my room, my aunt ________.