Gymnastics is_______exciting than swimming.
-----It’s an exciting film. I’ve just seen it. -------------_____________.
We must keep the classroom ___________.
----- Can you ride a horse? --------No, I ________.
Trees __________every year to make our city greener.
-----Do you know the man ________ is reading the book over there?--------- Yes, he is Mr. Green, our P.E. teacher.