res more than 3 times the amounts of calories that baby does.
 B．a boy aged 16 requires nearly twice the amount of calories that a boy aged 8 does
 C．a mother with a baby to feed uses up more calories than a hard-working farmer each day
 D．an old man needs less calories than an 8-year-old boy on account of his less movement.
67．Which statement agrees with the passage and the charts above?
 A．You need more calories for swimming than for mountain climbing.
 B．Food contains energy in the form of carbohydrates, proteins and fuel.
 C．Different people need different amounts of energy depending on their age, sex, and the activities they are in.
 D．3 grams of milk provides 16.6 calories because carbohydrate provides 3.8 Cal/gm, protein 4.0 Cal/gm, and fat 8.8 Cal/gm.
D
TWENTY years are just a blink in time. But 20 years is also long enough for a man to grow up. It is always painful. For Andre Agassi, maturing in the spotlight of international tennis competition was even harder.
On September 3, the American tennis player said a tearful goodbye to his 21-year career after a third-round defeat in the US Open. The 36-year-old tried his best, but was unable to keep up with German Benjamin Becker, more than ten years his junior.
“The scoreboard said I lost today, but what the scoreboard doesn't say is what I've found,” Agassi said to the fans. “I have found inspiration and you willed me to succeed.” It was an emotional speech at the end of a long career.
Agassi hated tennis as a teenager as much as he loves it now. His father made him play when he was a child. He got bored, and became a rebel(叛逆). The strict training that his father pushed upon him got in the way of his wild lifestyle. He grew hair long, wore colourful clothes and spat at an umpire. Over the years, he has made bad jokes during news conferences.
Asked what he would say to his 17-year-old self, Agassi answered, "I would say, I understand you a lot more than I want to be you."
The turning point in Agassi's career came in 1992 when he unexpectedly won his first Grand Slam（大满贯赛事） at Wimbledon. It was the first time Agassi understood what real champions finally understand: winning is a test of nerves and not just power, it's a marathon, not a sprint.
And what a marathon Agassi was about to begin. He cut his long hair, got fitter and tightened up emotionally. On the court, he was ranked No 1 for almost two years. His lowest point came in 1997 when his ranking dropped to No 141. He didn't quit though. “I knew that I would try to get the most out of myself every day from that day forward. That was my commitment," he said. "That never stopped.”
68．The underlined phrase “more than ten years his junior” in the second paragraph means     .
 A．having lower ranking than Agassi for more than ten years
 B．having higher ranking than Agassi for more than ten years
 C．more than ten years older than Agassi
 D．more than ten years younger than Agassi
69．From paragraph 3, we know after Agassi was defeated in the competition he felt        .
 A．angry with the judge   B．disappointed with the scoreboard
 C．regretful but encouraged  D．desparing
70．The passage implies           
 A．after 1997 Agassi began to take up marathon besides tennis
 B．Agassi began to play tennis before he was fifteen
 C．Agassi decided to quit his sports career
 D．the reason why Agassi lost his last competition was that he was lack of courage and power
71．The score of the match between Agassi and Becker is           .
 A．0-2 B．0-3 C．1-3 D．2-3
E
In cities with rent control, the city government sets the maximum rent that a landlord (房主)can charge for an apartment. Supporters of rent control argue that it protects people who are living in apartments. Their rent cannot increase;  therefore, they are not in danger of losing their homes. However, the critics say that after a long time, rent control may have negative effects. Landlords know that they cannot increase their profits. Therefore, they invest (投资)in other businesses where they can increase their profits. They do not invest in new buildings which would also be rent -controlled. As a result, new apartments are not built. Many people who need apartments cannot find any. According to the critics, the end result of rent control is a shortage of apartments in the city.
Some theorists argue that the minimum wage law can cause problems in the same way. The federal government sets the minimum that an employer must pay workers. The minimum helps people who generally look for unskilled, low-paying jobs. However, if the minimum is high, employers may hire fewer workers. They will replace workers with machinery. The price, which is the wage that employers must pay, increases. Therefore, other things being equal, the number of workers that employers want decreases. Thus, critics claim, an increase in the minimum wage may cause unemployment. Some poor people may find themselves without jobs instead of with jobs at the minimum wage.
Supporters of the minimum wage say that it helps people keep their dignity. Because of the law, workers cannot sell their services for less than the minimum. Furthermore employers cannot force workers to accept jobs at unfair wages.
Economic theory predicts the results of economic decisions such as decisions about rent control, price control and the minimum wage. The predictions may be correct only if "other things are equal." Economists do not agree on some of the predictions. They also do not agree on the value of different decisions. Some economists support a particular decision while others criticize it. Economists d