题目内容：

Most teenagers in the United States spend their time trying to make time for school, family and friends. But some choose bigger goals and make a difference in the world.

At age 15, Winter Vinecki has already had more _________ than most people have in their lifetime. Doctors discovered Winter’s fathers had a rare and _______ form of prostate cancer when she was nine years old. He died 10 months later. “When he was first diagnosed I immediately knew I had to do something to help him. That’s ______ I formed Team Winter for prostate cancer research and ______.” Winter Vinecki has raised almost 500,000 dollars. She has _______ prostate cancer education worldwide from Kenya to Mongolia_________ foot races called marathons, on seven continents. In the United States she travels _______ to talk about prostate cancer and _______ others to act. Winter Vinecki spoke recently at a conference in Los Angeles. “Prostate cancer is much more common, ________ the men don’t want to talk about it. So that’s why a nine-year-old girl had to go out there and start talking it for _______.”

Jack Andraka invented an inexpensive sensor that _______ cancers of the pancreas, ovaries and lungs. Jack is now 17and seeking patents for his latest inventions. He has developed low-cost water quality _______. They help identify and remove heavy metals and poisonous chemical from_____. “I hope to see them _______ in the developing nations.”

Sixteen-year-old Mary-Pat Hector saw a problem in her own community. She says too many young people were ________in gun violence. It kind of made her feel like she had to do something about it. So she started a _________ to educate young people about gun violence. “I just want the world to be a better place,” she said.

Mary-Pat hector, Jack Andraka, and Winter Vinecki say a ________ of supportive parents, the Internet and social media has helped them succeed; but Winter and Jack also created their inner ________. “Ｉthink the biggest thing for kids and adults is to never let age and gender be a _________ and to not just dream but dream big,” said Vinecki. “ Never let anyone else tell you ______.” Said Andraka. “Always keep going for your dream, so anything is possible.”

1.A. opportunities B. troubles   C. successes    D. risks

2.A. passive       B. sensitive  C. aggressive   D. negative

3.A. when         B. because   C. where       D. How

4.A. development  B. threat    C. panic       D. awareness

5.A. taken       B. received   C. searched   D. tested

6.A. through     B. off        C. over       D. beyond

7.A. officially  B. continually  C. peacefully  D. temporarily

8.A. promise      B. pay      C. urge        D. prefer

9.A. for         B. before   C. unless       D. but

10.A. her        B. teenagers C. them       D. fathers

11.A. cures     B. improves   C. prevents    D. identifies

12.A. experiments  B. devices  C. trials      D. data

13.A. body      B. water      C. land         D. food

14.A. carried   B. exposed    C. employed    D. handled

15.A. failing  B. fleeing     C. declining    D. dying

16.A. revolutionB. discussion  C. business     D. campaign

17.A. combinationB. convenience C. competence  D. consideration

18.A. harmony   B. satisfaction  C. selves    D. impressions

19.A. barrier    B. favor       C. benefit     D. difference

20.A. all         B. no        C. nothing      D. none