13.How many pounds of rubber does a young tree usually produce in a year?

　　A.Three pounds.

　　B.Ten pounds.

　　C.Twenty pounds.

　　D.Twenty-five pounds.

　　Passage Two

　　Questions 14 to 16 are based on the passage you have just heard.

　　14.What is the first American college degree?

　　A.The bachelor's degree.

　　B.The associate degree.

　　C.The master's degree.

　　D.The doctor's degree.

　　15.What is a terminal degree?

　　A.technical associate degree.

　　B.A degree which is designed for transfer.

　　C.A bachelor's degree.

　　D.One which ends;that is,the last degree one can ever hope to attain.

　　16.What is the number of credit hours for a B.A.in literature?

　　A.120 quarter hours.

　　B.95 quarter hours.

　　C.120 semester hours.

　　D.72 semester hours.

　　Passage Three

　　Questions 17 to 20 are based on the passage you have just heard.

　　17.What is the purpose of the talk?

　　A.To make recommendations on sensible dieting.

　　B.To report the latest advances in brain surgery.

　　C.To relate an experiment combining sleep and exercise.

　　D.To advise on ways of dealing with sleep difficulties.

　　18.According to the speaker what happens when you turn and twist to get comfortable position?

　　A.Your heart rate is lowered.

　　B.It becomes harder to relax.

　　C.You become too tired to sleep.

　　D.Sleep rhythms are disruped.

　　19.According to the speaker what sometimes causes people to have trouble sleeping?

　　A.Failure to rest during the day.

　　B.Lack of sleep on weekends.

　　C.Vigorous exercise in the evening.

　　D.Eating cheese before going to bed.

　　20.Where is the talk most probably being given?

　　A.At a radio station.

　　B.In a lecture hall.

　　C.In a biology lab.

　　D.At the doctor's office.

　　answers:

　　1.B 2.B 3.A 4.C 5.D 6.C 7.B 8.D 9.A 10.D

　　11.B 12.D 13.A 14.B 15.A 16.C 17.D 18.B 19.C 20.A