My sister，an inexperienced rider，was found sitting on the bicycle _________ to balance it．

　　A．having tried　　　　　　　B．trying

　　C．to try　　　　　　　　　　D．tried

Leaves are found on all kinds of trees, but they differ greatly_________ size and shape.

A. on    B. from    C. by    D. in

假定英語(yǔ)課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語(yǔ)言錯(cuò)誤，每句中最多有兩處。錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。 

增加：在缺詞處加一個(gè)漏子符號(hào)（/\），并在其下面寫出該加的詞。 

刪除：把多余的詞用斜線（\）劃掉。 

修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出修改后的詞。 

注意：1. 每處錯(cuò)誤僅限1詞； 

2. 只允許修改10處，多者（從第11處起）不計(jì)分。 

When I was in high school, most of my friend had bicycles. I hoped I could also have it. One   

day I saw a second-hand bicycle, that was only one hundred yuan. I asked my father /\ the money.   But he said he could only give me half of the money. He should find the other half myself. So I went to sell newspapers after the school. My father was pleased if I showed him the money a month  after. He gives me the other fifty. You can imagine how much happy I was when I rode to school on later gave my own bicycle.

The fellow was said to be _____ of a scholar.  As _____ turned out, he was a cheat.

　  A. something; he               B. much; he  

  　C. something; it               D. nothing; it

As we all know, several primary schools and factories were named _____ the hero.

   A. from          B. at         C. after       D. to

Nobody noticed the thief slip into the house because the lights happened to__________.

put up            B. give in     C. be turned on     D. go out

    A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increase the risk.

    Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma (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 (發(fā)生率) faster than any other cancer in the United States.

    But questions has been raised about sunscreen and whether it may has 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.

The underlined word “flaws” in the 2nd paragraph most probably means ______.

A. evidence        B. facts          C. faults              D. failures

People with fair skin and freckles          .

A. seldom use sunscreen              B. are more in danger of skin cancer

C. can be free from the harm of the sun   D. often expose themselves to the sun

We can learn from the passage that ______.

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

Which of the following can be the title for this passage?

A. Sunscreen to Prevent Skin Cancer           B. Sunscreen to Increase Skin Cancer

C. Skin Cancer Caused by Sunscreen           D. Skin Cancer Caused by Freckles

The final score of the basketball match was 93-94. We were only ________ beaten.

A. nearly                 B. slightly             C. narrowly                D. lightly

Usually John would be late for meetings. But this time, ____ to my surprise, he arrived on time.

A little                       B. much                   C. ever                     D. even

—I wonder how much you charge for your services.

— The first two are free____ the third costs $30.

A. while                  B. until      C. when                  D. before