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M: If I were you I’ d live in the city instead of going to work by train.
W: But the countryside is so beautiful in spring and fall.
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M: Nancy, why were you late for class this morning
W: I overslept and missed the bus.
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W: You were absent from class yesterday, Jack.
M: I’m terribly sorry I couldn’t come. I had a headache.
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W: Where do you live
M: I live in a suburb of London.
W: Is it far away from here
M: Yes. It usually takes me about one hour to drive to the office.
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M: If I were you, I would study for four hours every night in order to improve my English.
W:Well, you see, I haven’t got that much time to spare.
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W: You were absent from work yesterday, Brown.
M: I’m terribly sorry I couldn’t come. I had a headache.
[听力原文]11-15
How long could you live without food or water One or two days maybe The camel is an animal that can survive many days without food or drink. Camels would have great problems if they couldn’t do this, because most of them live in very dry parts of the world.
A camel is a rather strange-looking animal. It has a hump on its back and big flat feet. Each part of its body helps keep the camel alive in a place where little else can live. A camel can store extra food or fat in its hump. This food can keep it alive for many days. The flat feet of a camel do not sink in soft sand. And its hard mouth can even chew up sharp desert plants! Long eyelashes keep sand out of the camel’s eyes.
Camels do not really like people, but they are a big help to humans just the same. Desert peoples use camels the way that we use cars. They ride on camels and use them to carry things across the hot sand. Camels are sometimes called "ships of the desert&
[听力原文]
M: How far do you live from Beijing University, Professor Li
W: It takes about 20 minutes to drive from my home to the university. But during the rush hour it takes 10 minutes longer.
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M: I thought that you were going to the convention in Atlanta last Saturday.
W: I was planning to, but I haven’t been feeling well, so I Stayed home.
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W: OK, last night you were supposed to read an article about human bones. Are there any comments about it
M: Well, to begin with, I was surprised to find out there was so much going on in bones. I always assumed they were pretty lifeless.
W: Well, that’s an assumption many people make. But the fact is bones are made of dynamic living tissue that requires continuous maintenance and repair.
M: Right. That’s one of the things I found so fascinating about the article the way the bones repair themselves.
W: OK. So can you tell us how the bones repair themselves
M: Sure. See, there are two groups of different types of specialized ceils in the bone that work together to do it. The first group goes to an area of the bone that needs repair. This group of cells produces the chemical that actually breaks down the bone tissue, and leaves a hole in it. After that the second group of specialized cells comes and produces the n
A. Two different types of bones in the human body.
B. How bones help the body move.
C. How bones continuously repair themselves.
D. The chemical composition of human bones.
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