题目内容：

A: Hello, Larry!     1.

B: There will be a test tomorrow.

A:     2.

B: I can’t sleep before a big exam. Then I’m too tired to do well in the exam. 3.

A:   4.     It will be useful to help you fall asleep.

B: Good idea.   5.

A: Well, that’s a problem.

A. If I were you, I’d take a long walk before going to bed. B. What should I do? C. What’s the matter with you? D. Work hard before the exam. E. What if it doesn’t work? F. What are you worrying about?