48. (A) How to analyze photographic techniques.
(B) How to define photography.
(C) How Alfred Stieglitz contributed to the history of photography.
(D) Whether photography is superior to other art forms.

49. (A) They were influenced by his background in engineering.
(B) They were very expensive to take.
(C) They were among the first taken under such conditions.
(D) Most of them were of poor quality.

50. (A) He thought the copying process took too long.
(B) He considered each photograph to be unique.
(C) He didn't have the necessary equipment for reproduction.
(D) He didn't want them to be displayed outside of his home.

听力原文：
Part A:
1. You know the noise in my dorm has really gotten out of control. My roommate and I can rarely get to sleep before midnight.
Why don't you take the problem up with the dorm supervisor?
What does the man suggest the woman to do?

2. That's a nice computer you have.
Now all I have to do is figure you out how to use it.
What does the man imply?

3. Your little nephew is growing by leaps and bounds.
Yes. He must be at least three feet tall already.
What do the speakers say about the woman's nephew?

4. Debra says she is going to stay up all night studying for her exam tomorrow morning.
Wouldn't she be better off getting a good night sleep so she will feel fresh in the morning?
What does the man imply?
5. Did you pick up your letter at the post office?
No. I got my roommate to do it.
What happened to the letter?
6. Have you asked your brother to do the dishes?
Thousands of times.
What does the man mean?
7. Tom and I are having a party next week. We wonder if you and Joe would be free to join us.
Sounds great. But I'd better talk to Joe before we say yes.
What does the man imply?
8. Hi, I see you are walking. Where is your bicycle today?
Oh, I bent the wheel yesterday so I had to take it to the shop.
What does the woman mean?
9. Joe took a taxi home alone ten minutes ago.
I wonder why he didn't wait for me to go with him.
What does the woman mean?
10. I hear your older sister is on the Olympic team and on the honor's list. She must be quite a person.
She sure is. I've always looked up to her.
What does the man say about his sister?
11. What a morning. My train usually takes 45 minutes but today it took me over an hour to get to campus.
I saw signs in the station that constructions will be going on for the next three months.
What can be inferred from the conversation?

12. On my way up to your office I found this briefcase in the elevator. What do you think I should do?
Take it to the receptionist. The lost-and found box is there.
What does the man suggest the woman do?

13. Could you please tell me where I can find a CD by the Beetles?
Sure. It will be over there with all the CDs and pop rock. They are arranged alphabetically by group.
In what kind of store does this conversation take place?

14. Have you heard that Professor Jones is retiring?
Yes. The faculty won't find anyone to fill her shoes.
What does the woman imply about Professor Jones?

15. What a wonderful performance. The marching band has never sounded better.
Thanks. I guess all those hours of practice are finally paying off.
What does the woman mean?

16. What is Laura doing here today? I thought she was supposed to be out of the office on Mondays.
She's decided she'd rather have Fridays off instead.
What can be inferred about Laura?

17. I've got a coupon for half-off dinner at that new restaurant down the street. I think I'll use it when my cousin comes for a visit this weekend.
Where did you get it? I wouldn't mind trying that place out too.
What does the man want to know?