11.

　　A. Customer and assistant.

　　B. Father and daughter.

　　C. Dentist and patient.

　　D. Teacher and student.

　　12.

　　A. People should have taken things more seriously.

　　B. People should avoid being killed unexpectedly.

　　C. People should have made greater achievement.

　　D. People should not idle away their life.

　　听力材料：

　　11.

　　W: Have you found anything wrong with my teeth?

　　M: Not yet. I'm still examining. What brand oftoothpaste do you use,anyway?

　　Q: What is the probable relationship between theman and the woman?

　　正确答案：C

　　解析：由关键词teeth和examining可知正确答案为C(牙医和病人)。

　　12.

　　W: I firmly believe those who kill time will only end up with time killing them.

　　M: Well said. If one loafs around without being serious in doing things, nothing great will cometo them.

　　Q: What point are the speakers making?

　　正确答案：D

　　解析：女士认为消磨光阴者必为时光所弃。男士赞同该说法，并说，“一个人如果做事不认真，只是得过且过，必将无所成就。”因此，两人讨论的是如何充分利用时间、不可虚度光阴的问题。故D正确。