阅读理解，阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

Obama Still Smokes in Secret

　　US President Barack Obama has just made life more difficult for cigarette makers．He has just signed a law that will set tough new rules for the tobacco industry．The new law gives the US Food and Drug Administration the power to strictly limit the making and marketing of tobacco products．

　　At a White House signing ceremony Monday, Obama said that he was among the nearly 90％ of smokers who took up the habit before their 18 th birthday．

　　Obama, who has publicly struggled to give up smoking, said he still hadn't completely kicked the habit．Every now and then he still smokes in secret．

　　“As a former smoker I struggle with it all the time．Do I still smoke sometimes? Yes．Am I a daily smoker, a constant smoker? No．” Obama said at a news conference．

　　“I don' t do it in front of my lads．I don? t do it in front of my family．I would say that I am 95％ cured, but there are times when I mess up, " he said．

　　"Once you go down this path, it' s something you continually struggle with, which is exactly why the law is so important．The new law is not about me, it' s about the next generation of kids coming up．What we don ' t want is kids going down that path, " he said．

　　Nearly 20％ of Americans smoke and tobacco use kills about 440, 000 people a year in the United States due to cancer, heart disease, and other serious diseases．

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　　I work as a volunteer for an organization that helps the poor in Haiti．Recently I took my son Barrett there for a week, hoping to 　　1　　 him．

　　Before setting out, I told Barrett this trip would be tiring and 　　2　　．For the first two days, he said almost nothing．I worried the trip was too 　　3　　 for a 17-year-old．Then, on day three, as we were 　　4　　 over high rocky mountains, he turned to me and grinned(咧嘴笑), “Pretty hard．”

　　After that there was no turning back．A five-year-old girl, wearing a dress several sizes 　　5　　 large and broken shoes, followed Barrett around, mesmerized(着迷)．He couldn't stop 　　6　　．Later he said 　　7　　, “I wish I could speak French．” I was 　　8　　 － this from a boy who hated and 　　9　　 French classes throughout school．

　　Usually silent, he 　　10　　 Gaby, our host, and kept asking questions about the country and its people．He blossomed(活泼起来)．

　　　　11　　, the moment that really took 　　12　　 breath away occurred in a village deep in the mountains．I was 　　13　　 a woman villager for an article．135 centimeters tall, she was small in figure but strong in 　　14　　．Through determination, she had learned to read and write, and 　　15　　 to become part of the leadership of the 　　16　　．

　　Learning her story, Barrett was as 　　17　　 as I by this tiny woman's achievements．His eyes were wet and there was a 　　18　　 of love and respect on his face．He had finally understood the importance of my work．

　　When leaving for home, Barrett even offered to stay 　　19　　 as a volunteer．My insides suddenly felt struck．This 　　20　　 achieved all I'd expected．Soon he will celebrate his 18 th birthday．He'll be a man．

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