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Thomas Edison was awarded more patents on inventions than any other American. When he died in 1931, Americans wondered how they could best show their respect for him. One suggestion was that the nation observe a minute or two of total blackout. All electric power would be shut off in homes, streets, and factories. Perhaps this suggested plan made Americans realize fully what Edison and his inventions meant to them. Electric power was too important to the country. Shutting it off for even a short time would have led to complete confusion. A blackout was out of the question. On the day of Edison’s funeral, many people silently dimmed their lights. In this way they honored the man who had done more than anyone else to put the great force of electricity at his countrymen’s fingertips.
In order to honor Edison, many Americans dimmed their lights

A. all the year of 1931.
B. on the day of Edison’s funeral.
C. a few days around Edison’s funeral.
D. for one or two minutes.
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Good evening, ladies and gentlemen, and welcome. I’m sure we have all heard of the expression Think green . Tonight we are going to talk about Act green in our everyday life. The best place to start, of course, is in nut home. Every day people all over the world are hurting the environment without even knowing it. For example, busy families buy paper napkins and plastic food wrap at the supermarket. This helps them save time oil housework. But after these things have been used, what happens to them They go into the garbage can. In many places, especially in North America big cities are running out of places to throw their garbage. What can we do about it How can we cut down on garbage Now we can use plastic: napkins and plastic towels instead of paper towels. When we go grocery shopping we can choose products that are not over-packaged. For example, last week I bought a package of cookies in a hag. There was a plastic tree inside the bag, and then each cookie was in its own package on the tree in the bag. That’s over-packaging. We should also take our own bags to the grocery store to carry the things home in. What does the speaker’s attitude towards over-packaging according to the speech
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Honesty is the best policy, as the English saying goes. Unfortunately, honesty often deserts us when nobody is watching, British psychologists reported last week. Researchers at UK’s Newcastle University set up an experiment in their psychology department’s coffee room. They set a kettle, with tea, coffee and milk on the counter and hung up a sign listing the price for drinks. People helping themselves to a cup of tea or coffee were supposed to put a few cents into a box nearby. The scientists hung a poster above the money box and alternated each week between images of gazing eyes and pictures of flowers. The researchers found that staff paid 2.76 times more for their drinks when the image of the eyes was hung. Frankly we were shocked by the size of the effect, said Gilbert Roberts, one of the researchers. Eyes are known to be a powerful perceptual signal for humans, scientists say. Even though the eyes were not real, they still seemed to make people behave more honestly, said the leader of the study. Researchers believe the effect throws light on our evolutionary past. It may arise from behavioral traits that developed when early humans formed social groups to strengthen their chances of survival. For social groups to work, individuals had to cooperate, rather than act selfishly. There’s an argument that if nobody is watching us, it is in our interests to behave selfishly. But when we are being watched we should behave better. So people see us as co-operative and behave the same way towards us, one scientist said. The new finding indicates that people have striking response to eyes. That might be because eyes and faces send a strong biological signal we have evolved to respond to. The finding can be put to practical use. For example, images of eyes could boost ticket sales on public transport and improve surveillance systems to prevent antisocial behavior. The main idea of the passage is that
A. humans have a stronger response to eyes than to flowers.
B. photos of human eyes have a positive effect on people’s behavior.
C. the scientists’ new finding may have many practical uses.
D. people may behave dishonestly when there’s no one aroun
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