Every human being,no matter what he is doing,gives off body heat.The usual problem is how to get rid of it.But the designers of the Johnstown campus of the University of Pittsburgh set themselves the opposite problem-how to collect body heat.They have designed a collection system which uses not only body heat,but the heat given off by such objects as light bulbs and refrigerators as welt.The system works so well that no fuel is needed to make the campus' six buildings comfortable. Some parts of most modern buildings--theaters and offices as well as classrooms-are more than sufficiently heated by people and lights and sometimes must be air conditioned even in winter.The technique of saving heat and redistributing it is called "heat recovery".A few modem buildings recover heat,but the University's system is the first to recover heat from buildings and reuse it in others. Along the way, Pitt has learned a great deal about some of its producers.The harder a student studies the more heat his body gives off.Male students send out more heat than female students and the larger a student,the more heat he produces.It is tempting to conclude that _ for the Johnstown campus would be a hard-working overweight male genius . A good title for the passage would be _ . A) MODERN BUILDING'S HEAT SYSTEM B) A NEW HEAT RECOVERY SYSTEM IN PITTSBURGH C) A STRANGE OBJECT IN HEATING SYSTEM D) RECOVERY OF BODY'S HEAT
B

Now, there is a growing movement to pay the students in American schools---in some cases, even just for coming to class. Students at one school in New Mexico can earn up to three hundred dollars a year for good attendance. In Baltimore, Maryland, high scores in state graduation tests can be worth more than one hundred dollars. And a New Jersey school system plans to pay students fifty dollars a week to attend after---school tutoring programs. Schools that pay students can be found in more than one---fourth of the fifty states. Other schools pay students with food or other rewards. Robert Schaefer is a public education director. He says paying students may improve performance in the short term, but students develop false expectations for the future. He sees a lack of long term planning in these programs because of the pressure on schools to raise test scores. Public schools need to show improvement under the education reform law. Low---performing schools may lose their federal money; teachers and administrators may lose their jobs. Often these schools are in poor neighborhoods where getting students to go to school can be a continual problem. Critics say paying students sends a message that money is the only valuable reward. But some students say it makes school more exciting. And some teachers have reported getting more requests for extra help. In two thousand four, the city schools in Coshocton, Ohio, launched a program. They wanted to see if paying elementary school students as much as one hundred dollars would help in passing the state exams. Now, Eric Bettinger of Case Western Reserve University (EUCWRU) has reported mixed results. Math scores increased, but only white students were able to get paid. And there was no evidence of higher scores in reading, social studies and science. Official will decide later this year whether to continue the program. The text is mainly written to _ . A) persuade teachers to give students more prizes B) tell people how to become an excellent student C) introduce something about American paying students program D) explain the advantages of American paying students program
C

Feeling exhausted and hopeless, I began walking to my car. Every step seemed tiring, and every step was another to survive. As I looked up into the sky I thought about how my grandmother had left me, and my anger began to return. I was annoyed by the loss, and my belief in God was beginning to fade. I couldn't understand why these things happened. So as I stood in a public parking lot a million questions formed in my mind. Why did this happen to me? Aren't we supposed to get signs from the people that pass on? Why did I not feel her presence anymore? Is there a heaven? Suddenly, a woman driving right by my side rolled down her window and distracted my unanswered thoughts. "Excuse me, excuse me, excuse me," she said loudly. Thinking she was going to ask for my parking spot, I simply pointed to my car. The thought of having to say where my car was seemed like too much to bear. "No, excuse me," she said again. At this point, I felt I had no choice but to see what this annoying lady wanted. As I got closer, I was startled--was this my grandmother's nurse, Adu, who lived with her during her final months? I soon realized that she wasn't, although the resemblance was unusual. Then, I realized that this Adu was searching for something in her bag. Surprisingly, I was overcome by a sense of relief that led me to be patient the entire time the lady was searching. Others would be nervous by a stranger reaching in their bag, but I wasn't. She finally reached to the very bottom of her bag and handed me a three-page booklet. "It looks like you need this," she said calmly with a warm smile on her face. I looked down at the mysterious and obviously used booklet and on the front cover in big bold letters read "What Hope for Dead Loved Ones?" It took me only a few seconds to comprehend the exchange with this woman, but by the time I looked up, she was gone. I walked slowly into my car holding the tiny little book that was given to me with fear that it would fly away in the wind. I didn't know what it was exactly, but I knew... What can be inferred from the passage? A) The author and the woman became good friends later. B) The woman turned out to be the author's grandmother's nurse. C) The author knows the specific details about this experience. D) The author was very grateful to the unknown woman.
D