---You _______ your father. You are both tall and strong.---Yes. And we both have a pair of big eyes.

 Our classroom is very dirty ,let’s _____it_______.

I have a new idea. I want to ______.

 —The river smells so terrible! How did it come about?—People used to pour dirty water into it.

 —Why do you ____ very happy this afternoon?—Because we are going to spend the evening at Lily’s house.