Can you imagine traveling to work in a one - man submarine? Some scientists believe that some day one - man submarines will be as many as automobiles are today.A famous French driver says, "One day soon, men will walk on the ocean floor as they do on the street!" Perhaps during your lifetime people will travel, and live in the sea. If human beings want to live in the ocean, many human problems will need to be studied first. Some of these problems, similar to those of living in outer space, are pressure, lack of oxygen and weightlessness. Many questions are still unanswered.For example, can our blood make itself fit for underwater surroundings? What will happen to our muscle if we live in the water very long? Scientists are looking for answers. Perhaps in the future man will live in the sea, away from the crowded and noisy cities on land.Then sea has plenty of space, not only for floating living buildings and parks, but also for storing supplies and for underwater travel. Some scientists believe that ocean living will benefit man in more than physical ways. In the freedom and beauty of the deep sea, man may find new sources of joy. Which of the following is the similar problem as that of living in outer space? ( ) A) We are short of oxygen. B) We are not familiar with the underwater surrounding. C) We may die of weightlessness. D) We can finds new joys.
A
(Question)
Polluted airborne particles kill 7 million people a year, reports the World Health Organization. That news may not come as a surprise to anyone who has seen images of chimneys in Beijing, Delhi or Mexico. But those factories-or even the jammed roadways of modern cities-are not the biggest killer. Each year, some 4.3 million people die earlier than they should because of polluted air inside their homes, says the WHO. What's causing the air inside people's homes to be so poisonous that it kills around 11,000 people a day? Stoves. "Having an open fire in your kitchen is like burning 400 cigarettes an hour." says Kirk Smith, a professor at the University of California at Berkeley, whose research suggests that household air pollution from cooking killed between 3.5 million and 4 million people in 2013. Not all stoves cause this kind of harm. The ones Smith's talking about are those that the 3 billion people in the developing world use for heat and cooking, which burn solid fuels such as wood, coal, or crop waste instead of gas. The smoke from those fires produces harmful fine particles and carbon monoxide into homes. Poor _ then prevents that smoke from escaping, raising fine particle levels 100 times higher than the limits that the WHO considers acceptable. Breathing this air day in day out eventually causes a lot of diseases: more than a third of the 4.3 million die of a stroke, while a quarter die of heart disease. And around one-third of annual lung disease deaths worldwide are due to waste from coal stoves. Exposure tends to be extremely harmful for the people who spend the most time around the fire-usually women and young children. In fact, the WHO reports that household air pollution almost doubles the risk for childhood lung disease. According to Kirk Smith's research, _ . A) factories are the biggest killer worldwide nowadays B) burning 400 cigarettes an hour is extremely dangerous C) household air pollution from cooking is surprisingly harmful D) some 4.3 million people die earlier each year than they should
(Answer)
C
Ques: Too many cars have created a lot of serious problems in our world. Besides congestion , accidents and fast fuel consumption , cars are responsible for a good part of air pollution in big cities. All the time, they are pumping huge amounts of waste gases into the atmosphere. These gases are very harmful, causing disease and even death. Last winter, car fumes formed heavy smog over Beijing, making the sky gloomy for weeks and deteriorating people's health. One possible solution is to design and develop clean cars and clean fuels. In Tsinghua University, campus buses are driven by electricity. In Beijing some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as the petrol. But it may take decades for the new models of clean cars to completely replace the traditional ones. Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not use private cars. And the total number of cars in big cities will reduce greatly. On the whole, the elimination of air pollution needs the co-efforts from the government, the public and the environments. This problem will be solved only with the help of science and technology. What is the main reason for air pollution in big cities? A) congestion B) accidents C) fast fuel consumption D) cars
Ans: D
Ques:People who like their traveling have their reasons. They believe that traveling can help them expand their field of view, especially in the geographical and historical sense. They also think that touring will give them more chances to enjoy different kinds of food and experience new things that would never be brought by other activities. But those who dislike traveling also have some reasons. Traveling, in my opinion, dose more good than harm. Most importantly, it broadened our mind. We can get in touch with othercivilization , culture, customs and ideas. Through history, most people traveled because of necessity --not for pleasure. People traveled just in order to remain alive. They searched for food to eat or places to live in. They sometimes ran away from enemies. This is not to say that no one ever traveled just for the fun of it. In ancient times, for example, rich Romans traveled all the way to Greece to take part in the Olympic Games, and festivals. Of course, some people decided to travel just out of curiosity. They wanted to find out what it looked like beyond the horizon . Also business travel has been going on for centuries. Traders could not only make money but also learn to speak several languages and be introduced to different cultures. So, traveling does enrich our mind and draw new ideas to us. There is no doubt that we can get much from it. What's the main idea of this passage? A) Different kinds of traveling. B) Traveling enriches our mind. C) Ways to enjoy yourself while traveling. D) The advantages and disadvantages of traveling.

Ans:
B