Jeff Keith has only one leg. When he was only twelve years old, Jeff had cancer. Doctors had to　16　 off most of his right leg.
　17　 Jeff puts on an artificial leg(假肢). The leg is plastic. With the plastic leg, Jeff can ski, ride a bicycle, swim, and play soccer. He can also run.
Jeff made a plan with his friends who had plastic legs, 　18　. They decided to 　19　 across America. They all wore special T-shirts.　20　 it was “Run, Jeff, Run, Jeff Keith’s Run Across America”.
Jeff Keith ran across the United States from the east to the west 　21　 he was twenty-two years old. He started running in Boston(波士顿). Seven　22　 later, he stopped　23　 in Los Angeles（洛杉矶）. He ran 3,200 miles (1 mile =" 1.6093km)." Jeff wore out thirty-six pairs　24　 running shoes and five plastic legs. Jeff　25　 in cities on the way to Los Angeles. In every city people gave Jeff money. The money was not for Jeff,　26　 for the American Cancer Society. The Society used the money to help people know 　27　 about cancer.
On the way to Los Angeles, Jeff talked to people about　28　. Jeff is disabled, but he can do many things. He finished college and is studying to be a lawyer(律师). Jeff says, “People can do　29　 they want to do. I want people to know that. I ran　30 for disabled people. I ran for everybody.”

补全短文。（共10小题；每小题1分，计10分）

用方框内所给单词的适当形式填空，使短文完整、通顺。

Saving electricity and water is important in our life. There are 1.　　　　 little things for us to do at home to help save the Earth. They’re small, but  2.　　　　 of people do the same thing and  3.　　　　 a great difference. By making some small 4.　 　 to the way you do things at home, you are helping our planet day by day.

You can spend 5.　　　　 and improve your health better at the same time, so

6.　　　　 to save the environment is a good exercise!

You can use windows to make the house good to live in. You can keep windows and doors 7.　　　　 to keep the house warm in winter and open in summer. The wind will often keep you as cool as 8.　　　　 the open air.

And you must do something to save water. The water that you use in the kitchen can

9.　　　　 be used to wash the rice or water the flowers, and it’s very good for 10.　　　　. Please always remember to turn off the lights when you leave.

补全短文。（共10小题；每小题1分，计10分）
用方框内所给单词的适当形式填空，使短文完整、通顺。

A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.
　　“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.
　　Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).
　　Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
　　Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.
　　All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning----all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”
【小题1】Carskadon suggests that high schools should not start classes so early in the morning because _______.