This is not my Walkman. It’s _________. Mine is over there.

I think _____ of the materials I listen to at the beginning of the exam _____easy.

On weekends, I often go to movies _____ my friends.[ ]

He is quite famous a singer and actor _ his great performance in Taiwan and the mainland. [ ]

Listen ! Helen is singing in the next room.—It _______ be Helen. She has gone to Beijing.