单选题 Questions 19-22 are based on the following dialogue:

单选题 What did the professor want to talk to Ann about?

A、 A vacation trip to Yellowstone Park.
B、 A lecture by a visiting professor.
C、 Her biology thesis.
D、 A research project.

【正确答案】 D

【答案解析】[听力原文]19-22
M: Thanks for stopping by, Ann. I'd like to talk to you about a research project I thought you might be interested in. A friend of mine is working at Yellowstone National Park this summer.
W: Yellowstone! I've always wanted to spend some time out in there.
M: Wait till you hear what the project is. She is working with the buffalo population. The herds have been increasing in size lately, which is good in theory.
W: Yeah but I thought they were in danger of becoming extinct.
M: Well, apparently, because of all the winter tourists, paths are created in the snow. More buffalo are surviving the harsh winters because the paths make it easier for the buffalo to move around and find food. But it turns out that some of the herds are infected with a disease.
W: Oh yeah, I heard about that.
M: It has been around for quite a while. And because the buffalo population is increasing, the disease has begun to spread to the cattle ranches that border the park.
W: That's bad news! Isn't that the disease that causes animals to abort their young?
M: Yes, and some of the ranchers even want to destroy the buffalo herds.
W: That's awful! Have they made much progress with the research?
M: So far, they've been collecting tissue samples from dead buffalo to study the disease.
W: I'd really be interested in working on this. You know I've been researching diseased animal populations.
M: That's why I thought of you I mentioned your name to my friend. She's hoping you'll be able to spend the whole summer out there.
W: Well, I was going to work on my thesis a lot in July, but I'm sure my adviser wouldn't want me to pass up this opportunity.

对话的开始“I'd like to talk to you about a research project I thought you might be interested in”的意思是“我想跟你谈谈关于一个研究项目的事情，你可能会感兴趣。”所以选择D。

单选题 According to the professor, why is the buffalo population increasing?

A、 More buffalo are surviving the winter.
B、 Fewer buffalo are dying of disease.
C、 More buffalo are being born.
D、 Fewer buffalo are being killed by hunters.

【正确答案】 A

【答案解析】野牛数量增加是由于冬季旅客在雪上踩出路径，从而使得野牛容易四处行走觅食，所以更多的野牛得以活过严冬。因而答案选择A。

单选题 Why does the professor think Ann would be interested in going to Yellowstone?

A、 She is from Yellowstone.
B、 She needs the money.
C、 She has been studying animal diseases.
D、 Her thesis adviser is heading the project.

【正确答案】 C

【答案解析】对话中谈到她说“I've been researching diseased animal populations...”，意思是“我一直在研究患病动物群落……”，所以她对对方提出的研究项目非常感兴趣，所以答案就是C选项。

单选题 How will Ann probably spend the summer?

A、 Collecting information about the disease.
B、 Working on a cattle ranch.
C、 Writing a paper about extinct animals.
D、 Analyzing buffalo behavior.

【正确答案】 A

【答案解析】对话中男生说他的朋友希望她能跟她在那里度过整个暑假(从事研究)，虽然女生说她要在7月写硕士论文，但还是说“I'm sure my adviser wouldn't want me to pass up this opportunity．”意思是“我的导师也不会愿意我错过这个机会。”从而表明她会争取去参加野外科研活动。而在前面对话中提到，已经进行的研究工作内容是“collecting tissue samples from dead buffalo to study the disease(搜集生病野牛的组织样本来研究疾病)”，所以女生将要从事的活动也是类似工作。所以选择A选项。