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听力原文：W: Dr. Thomas? This is Keet Bradley from the daily news. I'd like to ask you some questions about the new official standard weight that you purchased.
M: I'd be happy to help you. What would you like to know?
W: First of all, how was the standard weight used?
M: Well, the people in our department use it to check the scales all over the country. The department of weights and measures, we are a government agency. It's our responsibility to see that all the scales measure a kilogram accurately so this is the way we use to adjust the scales.
W: How did you check the scales before?
M: We have an old standard weight that we used to use. It had to be replaced because it was imprecise. Yon see it was made of poor quality metal that was too porous. It absorbed too much moisture.
W:Oh. So when the weather was humid it weighed more and when it was dry it weighed less.
M: Exactly. And that variation can affect the standards of the whole country. So our department had the new weight make out of higher quality metal.
W: How much did it cost?
M: About 45 thousand dollars.
W: 45,000 dollars? For one kilogram weight? That's more expensive than gold. Is it really worth that much?
M: I'm sure it is. Industries depend on our government agency to monitor the accuracy of scales so that when they buy and sell their products there is one standard. Think of the drug industry, for example, those companies rely on high accuracy scales to manufacture and package medicine.
What is the conversation mainly about?

A.
M:
B.
W:
C.
W:Oh.
D.
M:
E.
W:
F.
W:
G.
What
H.How
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B．A
J.
C．The
K.
D．Using
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Everyone is familiar with the cry of the director who is about to shoot a scene for a new movie: 'Quiet on the set!' is the command. When all is ready,the next order is 'Action!' Then the actors begin to play their roles in the setting that has been made for them.Before they have gotten this far, however, great pains have been taken to set the scene just the way the director wants it. The reason such care is taken to set a scene is that the set ting must do a great deal for the viewers when the movie is completed.Think for a moment about a movie or television show you have seen recently. As soon as the show begins, you get some very distinct impressions. From the way people dress, the way they live, and the vehicles they ride in, you know at once where you are and if the story takes place in the present or in the past. If it's a bright, sunny day in a park, you will tend to feel bright and sunny yourself. But if clouds are lowering darkly over a cemetery, you will probably squat down and get set for a good scare. If you are shown a mansion in Texas, you will begin to think about what it's like to be rich. If the setting is a city slum, you will begin to think about the problems of the poor.So the setting does a number of things. It prepares a scene that allows you to believe you are really viewing a certain place at a certain time. The setting prepares you for the action that will take place. And because it makes you feel a certain way, the setting helps put you in the proper mood to appreciate that action. Setting also starts you thinking about important ideas that are presented through the movie.The main idea of the passage is about____________.
A．the
E.the
F.the
G.the
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听力原文： Japan's trade surplus jumped again last month with the sluggish economy continuing to slow demand for imports. Finance Ministry figures show the January trade surplus was 5. 3 billion. That was almost 40% higher than the same period of last year. It was the 25th consecutive monthly gain in the surplus from previous year level. Japan's trading partners have become increasingly irritated with its growing trade surplus.Japan's demand for imports last month
A.
Japan's
B.continued
C.continued
D.unchanged
D．jumped
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