---What do you think of the 3D film UP?---I enjoy it from beginning to end. This is the best one I have        seen.

—What’s the weather like outside?—It’s raining heavily . You’d better not go out.

 ---Have you ____ cooked for your parents?   ---Yes, of course.

Who sings_________ of the three?

、This question is ______ easy, all the students can answer the question.