情景对话。

(1)—What are the students doing？
—They                a class.

(2)—What is the girl doing？
—She is       a picture.

(3)—       are they？
—They are in the living room.
—What    they       ？
—They are            TV.

(4)—Is the girl sleeping？
—   ，she isn’t. She is           rope.