Q: Read the following article and answer the question. Article: Li Denghai, with his muddy boots and tanned face, may not look like he is one of China's famous agricultural pioneers. But the 61-year-old man from Shandong Province has made scientific breakthroughs , which made great contributions to China's food security . His main work has been in achieving the higher output of corn production. Li, who holds the world record for the highest output of summer corn, once says, "Corn has a life; it sings and dances. If you listen clearly, it can speak to you." He started his research in 1969 when he was 20 and just dropped out of a high school. He then read an article which pointed that corn output per mu in the USA was six times higher than that in China. He was shocked and set out to work on just a small piece of land _ to see if he could increase the output. He often went to the field with a flashlight late at night, if he had been away during the day. By careful nurturing he managed to double the output. Li Denghai was awarded the "China Award for Significant Contribution to the Maize Industry" in 2005, and the same year the company named after his own name came into the market on the Shenzhen Stock Exchange. Li, however, is never happier than when he is in the middle of his cornfields. "I can forget my tiredness when talking to my corns," he says. Question: From Mr. Li's words in this passage, we can learn that _ . Answer: | OPTIONS:
- he is not good at communicating with people
- he is too tired to go to the corn fields
- he talks to his corn when feeling lonely
- he loves his career deeply
A: he loves his career deeply

Q: Read the following article and answer the question. Article: Traveler My fifteen-year-old son has just returned from abroad with rolls of exposed film and a hundred dollars in uncashed traveler's checks, and is asleep at the moment.His blue duffel bag lies on the floor where he dropped it.Obviously, he postponed as much sleep as he could: when he walked in and we hugged, his electrical system suddenly switched off, and he headed directly for the bed, where I imagine he beat his old record of sixteen hours. It was his first trip overseas, so weeks before it, I pressed travel books on him, and a tape cassette of useful French phrases; drew up a list of people to visit; advised him on clothing and other things.At the luggage store where we went to buy him a suitcase, he headed for the duffels, saying that suitcases were more for old people. During the trip, he called home three times: from London, Paris, and a village named Ullapool.Near Ullapool, he climbed a mountain in a rainstorm that almost blew him off.In the village, a man spoke to him in Gaelic, and, too polite to interrupt, my son listened to him for ten or fifteen minutes, trying to nod in the right places.The French he learned from the cassette didn't hold water in Paris.The French he talked to shrugged and walked on. When my son called, I sat down at the kitchen table and leaned forward and hung on every word. His voice came through clearly, though two of the calls were like ship-to-shore communication.When I interrupted him with a "Great!" or a "Really?", I knocked a little hole in his communication.So I just sat and listened. I have never listened to a telephone so attentively and with so much pleasure.It was wonderful to hear news from him that was so new to me.In my book, he was the first man to land on the moon, and I knew that I had no advice to give him and that what I had already given was probably not much help. The unused checks are certainly evidence of that.Youth travels light.No suitcase, not much luggage and a slim expense account, and yet he went to the scene, and came back safely.I sit here... Question: According to the passage, which of the following could best describe the author's son? Answer: | OPTIONS:
- Polite and careless.
- Creative and stubborn.
- Considerate and independent.
- Self-centered and adventurous.
A: Considerate and independent.

Q: Read the following article and answer the question. Article: Many people believe the glare from snow causes snowblindness. Yet, with dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snowblindness ,when exposed to several hours of" snow light". The United States army has now determined that glare from snow does not cause snowblindness in troops in a snow -covered country. Rather ,a man's eyes frequently find nothing to focus on in a broad space of snow- covered without- grass land. So his gaze continually moves and jumps back and forth over the entire landscape in search of something to look at. Finding something, hour after hour, the eyes never stop searching and the eyeballs become tired and the eye muscles ache. Nature makes up for this discomfort by producing more and more fluid which covers the eyeball. The fluid covers the eyeball in increasing quantity until it makes eyes difficult to see dearly, and the result is total, even though for a short time, snowblindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of the troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow - covered landscape. Even the scouts themselves throw lightweight, dark - colored objects ahead on which they can focus too. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching the snow -blanketed landscape. By focusing their attention on one object at a time. the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a continuous white land is overcome. Question: To prevent snowblindness caused by the strong light from snow, wearing glasses or not _ . Answer: | OPTIONS:
- depends on whether the snow is white enough
- makes no difference
- makes much difference
- depends on whether the snow is thick
A: makes no difference

Q: Read the following article and answer the question. Article: Miss Gogers taught physics in a New York school. Last month she explained to one of her classes about sound, and she decided to test them to see how successful she had been in her explanation. She said to them, "Now I have a brother in Los Angeles. If I was calling him on the phone and at the same time you were 75 feet away, listening to me from across the street, which of you would hear what I said earlier, my brother or you and for what reason?" Tom at once answered, "Your brother. Because electricity travels faster than sound waves." "That's every good," Miss Gogers answered; but then one of the girls raised her hand, and Miss Gogers said. "Yes, Kate." "I disagree," Kate said. "Your brother would hear you earlier because when it's 11 o'clock here it's only 8 o'clock in Los Angeles." Question: Miss Gogers was teaching her class _ . Answer: | OPTIONS:
- how to telephone
- about electricity
- about time zone
- about sound
A: about sound