—Listen ! Helen is singing in the next room.It ____ be Helen. She has gone to Beijing.
Amy usually __________ from school, but today she goes home by bike.
——Does he ____________ a watch? —— Yes, he _________________ .
——What does your father look like? —— _________________ .
——Kitty, you are a good dancer. —— _______________ .
______ the blackboard, and you can ________ some number on it.