单选题

A、 She doesn't know which topic to choose.
B、 Her assignments are due on the same day.
C、 She's concerned about the spotted owl.
D、 She dislikes her economics class.

【正确答案】 B

【答案解析】[听力原文]19-21
W: Hi, Bill, how is it going?
M: Oh, hi, Jane. I'm OK. How about you?
W: You can probably tell just by looking at me. I'm really busy. Hey, What are you reading?
M: A pretty interesting article. My biology professor assigned it, and I thought I would just look it over. But I got really involved in it. It's about endangered species.
W: That sounds pretty interesting. I'm getting frustrated with the two research papers I'm struggling with.
M: Oh?
W: And can you believe they are both due on the same day?
M: That's tough.
W: I'll get through it. So what's this you are reading?
M: Well, it's basically about the choices conservationists are faced with. You know, these days when funding is so hard to come by.
W: Wait a minute. Does it focus on biology or economics?
M: Both. Conservationists don't have enough funding to save every endangered species in the world, so they have to decide based on what would be lost if a species became extinct.
W: Can you give me an example of what you mean?
M: Take for instance, two animals, the spotted owl and the tailed toad. The article says the toad is unique. It has no relatives. But there are a lot of varieties of owls.
W: So, if that toad became extinct, we'd lose an important link in the chain of evolution, right?
M: Exactly. But that isn't so for the owl. So for conservationists, it might be a clear choice which animal to save.
W: I see. I am glad I don't have to make that kind of decision. Aren't you?
19．Why doles the woman say she's frustrated?

[解析] 由对话中女士所说的I'm getting frustrated with the two research papers I'm struggling with…they are both due on the same day可知，女士的两篇论文要在同一天上交，所以她很灰心。due作为形容词表示“到期的”。

A、 A scarcity of jobs in their field.
B、 Inadequate training in methods of biological research.
C、 Difficulties in classifying all of the varieties of owls.
D、 A lack of funding for their work with endangered species.

【正确答案】 D

【答案解析】[听力原文]
What problems do conservationists have?

[解析] 对话中男士提到Conservationists don't have enough funding to save every endangered species in the world，so they have to decide based on what would be lost if a species became extinct，可见自然资源保护论者 (conservationists)在挽救濒危物种方面面临资金短缺问题。

A、 It has numerous traits in common with the spotted owl.
B、 Its population is increasing.
C、 It may not survive without special efforts of conservationists.
D、 Its role in the chain of evolution has not yet been examined.

【正确答案】 C

【答案解析】[听力原文]
What can be inferred about the tailed toad?

[解析] 对话中提到the toad is unique．It has no relatives，toad既然是很独特的物种，就很可能面临灭绝，因此没有专门的挽救措施，它们可能存活不了，[c]正确。[A]与对话内容相反，对话中只提到了两个不同物种的区别，并未涉及相同之处。从对话we'd lose an important link in the chain of evolution我们可知toad在进化链中很重要，所以排除[D]。从对话中我们知道toad已濒临灭绝，所以不可能数量上涨，[B]也不正确。