| A．of which | B．on which | C．from which | D．above which |
2 . A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increases the risk.
Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the associstion between sunscreen use and melanoms(黑素瘤). They said that they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma.
Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the United States.
But questions have been raised about sunscreen and whether it may have the opposite effect, perhaps by allowing people to remain exposed to the sun longer without burning.
The researchers said that among the problems with some earlier studies is that they often failed to take into account that those people most at risk for skin cancer—people with fair skin and freckles（雀斑）, for example—are more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more often.
The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study.
1. What is the meaning of the underlined word “flaws” in the 2nd paragraph?| A．Evidences | B．Facts | C．Faults | D．Failures |
| A．They seldom use sunscreen. |
| B．They are more in danger of skin cancer. |
| C．They can be free from the harm of the sun. |
| D．They often expose themselves to the sun. |
| A．Sunscreen users get skin cancer more often. |
| B．The volunteers have proved the effect of sunscreen. |
| C．The new study was based on the experiences of volunteers. |
| D．The number of skin cancer patients is increasing in America. |
| A．Sunscreen to Prevent Skin Cancer |
| B．Sunscreen to Increase Skin Cancer |
| C．Skin Cancer Caused by Sunscreen |
| D．Skin Cancer Caused by Freckles |
| A．if not | B．if ever | C．if any | D．if so |
| A．when | B．which | C．that | D．where |
5 . When I met him, I had a lot of anger inside of me. I’ve lived my whole life in Spanish Harlem, but in my neighborhood, there are shoot-ups all the time. I know kids who have been shot or beaten up. I have friends who ended up in prison. I could have ended up that way, too, but Mr. Clark wouldn’t let that happen.
Mr. Clark worked long hours, making sure I did my work. My grades rose. In fact, the scores of our whole class rose. One day, he took our class to see The Phantom of the Opera, and it was the first time some kids had ever been out of Harlem. Before the show, he treated us to dinner at a restaurant and taught us not to talk with our mouths full. We did not want to let him down.
Mr. Clark was selected as Disney’s 2000 Teacher of the Year. He said he would draw three names out of a hat; those students would go with him to Los Angeles to get the award. But when the time came to draw names, Mr. Clark said, “You’re all going.”
On graduation day, there were a lot of tears. We didn’t want his class to end. In 2001, he moved to Atlanta, but he always kept in touch. He started giving lectures about education, and wrote a bestselling book based on his classroom rules, The Essential 55. In 2003, Mr. Clark took some of us on a trip to South Africa to deliver school supplies and visit orphanages (孤儿院). It was the most amazing experience of my life. It’s now my dream to one day start a group of women’s clubs, helping people from all backgrounds.
1. Without Mr.Clark, the writer _______.| A．might have been put into prison |
| B．might not have won the prize |
| C．might have joined a women’s club |
| D．might not have moved to Atlanta |
| A．a show | B．a speech |
| C．a classroom rule | D．a book |
| A．None. | B．Three. | C．Fifty-five. | D．All. |
| A．Mr. Clark went to South Africa because he liked traveling |
| B．Mr. Clark helped to set up a group of women’s clubs |
| C．a good teacher can help raise his or her students’ scores |
| D．a good teacher has a good influence on his or her students |
| A．had he realized | B．did he realize | C．he realized | D．he had realized |
| A．Nothing | B．Something | C．Everything | D．Anything |
—Taking plenty of exercise every day.
| A．power | B．strength | C．force | D．energy |
| A．in view of | B．in need of | C．in touch with | D．in harmony with |
— Well, I just follow the directons in the cookbook.
| A．feature | B．plan | C．cost | D．trick |
