句型转换My pen is in the pencil-box.就划线部提问
_______ _______ your pen?Is it on the sofa?改为复数形式
______ _______ on the sofa?Dale’s baseball are yellow and red.就划线部提问
_______ _______ are Dale’s baseballs?She doesn’t have a soccer ball.改为肯定句
She ________ a _______ ball.We play volleyball.改为由let开头的祈使句
________ ________ volleyball.