【填句补文】There is a difference between science and technology. ________. Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships; technology has to do with tools, techniques, and procedures for applying the findings of science.

【填句补文】Arms. How you hold your arms shows how open and receptive you are to people you meet. If you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way. ________. If someone upsets you, just cross your arms to show you’re unhappy!

【填句补文】Though little research has been carried out about how exactly the sunspot will negatively harm the health of the people. ________. So, scientists warn that people going outdoors should be careful to protect their exposed skin and eyes with clothes, umbrellas and sunglasses from the strong sunlight rich in ultraviolet rays.

【填句补文】Home schooling is often more interesting than regular schools, but critics say that home-schoolers are outsiders who might be uncomfortable mixing with other people in adult life. ________. However, most parents don't have the time or the desire to teach their children at home, so schools will continue to be where most children get their formal education.

【填句补文】All children in the United States have to receive an education, but the law does not say they have to be educated at school. A number of parents prefer not to send their children to school. ________. There are about 300,000 home-schoolers in the United States today.

【填句补文】Doctors believe that secondhand smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke from other people’s cigarettes．________. The US Environmental Protection Agency reports that about 53，000 people die in the United States each year as a result of exposure to secondhand smoke.

【填句补文】The author says that interpersonal relations should be taught as a required course in every school, along with reading, writing, and mathematics. ________. That is at least as important as how much we know.

【填句补文】The smoke that comes from a lit cigarette contains many different poisonous chemicals. In the past, scientists did not think that these chemicals could harm a nonsmoker’s health. ________. They discovered that even nonsmokers had unhealthy amounts of these toxic (有毒的) chemicals in their bodies.

【填句补文】The acid rain(酸雨) is said to be caused by pollution from oil wells in the Gulf of Mexico. Car exhaust gases are also a problem. Local volcanic eruptions make the problem even worse. Nevertheless, with enough money and effort, researchers say that many of the problems could be solved and the rate of erosion reduced. ________.

【填句补文】David Guterson and his wife teach their three children at home. Guterson says that his children learn very differently from children in school: ________. For example, when there is heavy snowfall on a winter day, it may start a discussion or reading about climate, snow removal equipment, Alaska, polar bears (北极熊), and winter tourism. A spring evening when the family is out watching the stars is a good time to ask questions about satellites and the space program.