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Some of her good friends.

Question 19 to 22 are based on the conversation you have just heard.

19.  A) A more economical diesel fuel.

B) Characteristics of a new type of fuel.

C) Where a new energy source is located.

D) How to develop alternative energy sources.

20. A) He’s studying for a test.

B) He lost his notes.

C) He missed the class.

D) He’s doing research on alternative.

21.  A) It will reduce the amount of pollutants in the air.

B) It will increase the amount of unpleasant odors from vehicles.

C) It will eventually destroy the ozone layer.

D) It will reduce the cost of running large vehicles.

22.  A) To help him explain the information to his roommate.

B) To help him write a paper.

C) To prepare for a test.

D) To tell her if the notes are accurate.

Question 23 to 25 are based on the conversation you have just heard.

23. A)  The woman has passed her final exams.

B)  The woman wants to know how to write term papers.

C)  The woman is going to visit Gettysburg.

D)  The man introduces his experiences in Gettysburg.