C. inside D. towards

　　　　解析：选C。inside"内心的，内部的，里面的"。此处指"我"内心涌出一种帮助他人的欲望。

　　16. A. window B. door

　　　　C. seat D. hand

解析：选A。前文的"I was driving to pick up my daughter from school"可判断作者此时是在车上，因此她此时是摇下车窗(window)。

　　17. A. excited B. wondered

　　　　C. surprised D. asked

　　　　解析：选C。在我给他钱的时候，我感觉非常奇怪。介词and 表示并列，因此该词应与strange近义，故选C。

　　18. A. laughter B. cry

　　　　C. happiness D. joy

解析：选D。从下文得知，他三年没有回家看妈妈了，因此现在有了路费可以回家了，他非常高兴(joy)，激动得热泪盈眶。

　　19. A. watched B. visited

C. missed D. called

解析：选B。宾语是my mother，应填visit，表示"看望，探望"。

　　20. A. giving B. offering

　　　　C. money D. having

解析：选A。giving"给予"，本文讲述的是"我"帮助别人的故事。

　　Ⅲ. 阅读理解

　　A

　　(2009年武汉4月)Weighing too much can damage your health，and obesity is a growing problem for both kids and adults around the world.

　　Sleep might be one answer to the problem. A new study has found that elementary school students who slept too little were more likely to gain pounds. In the United States today, some 9 million children over the age of 6 are obese(too fat).

　　Past studies have shown a link between sleeping less and weighing more，but scientists have had a tough time determining"Which came first，the chicken or the egg？" says Julie C. Lumeng of the University of Michigan in Ann Arbor. In other words，it hasn't been clear whether kids who weigh too much have trouble sleeping, or whether sleeping less leads to weight gain. Both scenarios(情况)seemed equally possible.

　　To get a better idea of which causes which, Lumeng and his colleagues interviewed the parents of 785 third graders from around the United States. The parents answered questions about how well their kids slept that year. Three years later, the parents answered the same questions. By sixth grade,18 percent of kids involved in the study were obese. The scientists found no relationship between weight and the students' race or gender. It also didn't matter how strict their parents were. Obesity struck all of these groups equally.

　　Instead，sleep seemed to be the key factor. Over the 3 years of the study, the children averaged a healthy 9. 5 hours of sleep a night. Some kids, however，slept a lot more-or less-than others. For the sixth graders, every hour of sleep above the 9. 5hour average was linked to a 20 percent lower risk of being obese. Sleep appeared doubly important for the third graders. Every extra hour of sleep they got was linked to a 40 percent drop in obesity by third grade.

　　"I expected we'd find that this(sleep link with obesity) was just a_bunch_of_bunk，"says Lumeng，a pediatrician. But their findings were convincing. No matter how her team looked at the link，"we couldn't make it go away. "

1. According to the research， ________.