三.听对话，选出最佳选项。
听第一段对话，完成第11小题。
( )11. How many times has Jane read the book Harry potter?
A. Once B. Three times C. Twice
听第二段对话，完成第12小题。
( )12. What’s wrong with Lily?
A. She lost her dog. B. She did badly in the English exam. C. She failed the math exam
听第三段对话，回答第13小题。
( )13. What may cause the man’s problem?
A. The polluted soil. B. The polluted air. C. The polluted water.
