謝忠明課堂：6月英語(yǔ)六級(jí)聽(tīng)力精講班講義(二)

　　The study says just fifty-three percent of birth attendants reported washing their hands with soap and water before _______________. And only fifteen percent of mothers reported washing their hands before ______________ their newborn.

　　4. Key Words: students’ summer travel in US

　　More than fifty organizations are approved to act as sponsors. Sally Lawrence _____________________________________________________________, and to research a few different sponsors.

　　Sponsors must ______________ the English language ability of students and make sure they are ______________ in school. But sponsors do not all ______________ the same price for their services.

　　5. Key Words: stem cell

　　Some experts predict that doctors will someday use stem cells to treat many different ______________.Yet so far there has been ___________________________________________

　　6. Key Words: high fuel price

　　High fuel prices are affecting all areas of life, including education.

　　The United States has an estimated four hundred seventy-five thousand school buses. Each day they carry more than twenty-five million children, half of all schoolchildren in the country.

　　The price nearly doubled, to a dollar and eight cents, by the end of school in June. As a result, schools are looking for ways to _________________. Bus routes are being redrawn or, in some cases, ______________. Some areas are buying buses that use natural gas or other ________________________. And a few places are _______________ hybrid fuel-electric technology.

　　7. Key Words: vitamin and health

　　Vitamin D helps ________________________ grow strong and healthy. Low levels of vitamin D can lead to problems such as rickets, a ________________ mainly found in children. But more and more research is suggesting that vitamin D might also help prevent many diseases.

　　The easiest way to get vitamin D is from sunlight. The sun's ultraviolet _____________ react with skin cells to produce vitamin D. But many people worry about _________________________________________ from the sun. As a result they cover their skin or wear sun-block or stay out of the sun.

　　Also, darker skinned people produce less vitamin D than lighter skinned people. Production also _______________ in older people and those living in northern areas that get less sunlight.

　　8. Key Words: light pollution

　　Sunlight bounces off the light-colored surface, so it stays cool on hot days.

　　areas of cities trap heat. This is known as ________________________________. The Green Alley program also uses _______________ materials. And it uses energy-saving streetlights. These direct light downward to reduce light pollution at night.