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.
相关推荐：
四六级培训名师邀请各地考友互动 立即加入 精华汇集：英语四级写作常用句型、模板及范文 呕血奉献：英语六级单选正确选项高频词汇总结 专题：2009年6月四六级考前冲刺该怎么复习
