阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

　　Mama' s voice floated through the apartment a s she sang a Mexican folk song that I had heard all my life．“Hola, ” she greeted me when she came out of the bedroom．“Plea se speak to me in 　　1　　, ” I interrupted．She paid no attention and 　　2　　 speaking in Spani sh．The word s 　　3　　 me of my grandparent s and birthday partie s in Mexico, but I knew my mother' s life would be 　　4　　 if she learned to speak Engli sh．We had lived in the United State s for three year s, and she still had difficulty 　　5　　 to store owner s and my teacher s．I wa s determined that she should try．“Why won't you speak Engli sh? ” I 　　6　　．“Don't you want to be 　　7　　 to talk to people here? ” “I sabel, ” she whi spered．Mama alway s whi spered when she wa s up set with me．“What? ” I wa s not 　　8　　 with her, either．She 　　9　　 for the Engli sh word s．“Come with me to the, uh-how do you say it? Meeting．” “What kind of meeting? Where i s it? ” I 　　10　　 her, but now she refu sed to an swer．In 　　11　　, we drove acro s s town to the college, where she pulled into a brightly lit parking lot．I wa s 　　12　　．I had expected a meeting at someone' s 　　13　　-a garden club or a parent s’ group．Then I 　　14　　 a sign on a door．My mother wa s 　　15　　 night cla s se s to learn Engli sh!

　　“I don't under stand．　　16　　 you’re learning Engli sh, why won't you speak Engli sh at home? ” I a sked．“You'll learn fa ster if you 　　17　　 with me．” “I speak Engli sh here, ” she said in her thick accent．She he sitated, putting the word s together, and then went on, “I speak Spani sh at home 　　18　　 you．”

　　I 　　19　　 under stood-she spoke Spani sh at home so that I wouldn't forget the word s, song s, and 　　20　　 of Mexico．I said, “O．K．, Mama, e stabien．”

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　　Brian arrived at the San Francisco airport two hours before the fligt to Paris．He was Wearing three shirts,a jackt,two pairs of socks,a pair of shorts,and two pairs of jeans．He wascarrying one．small backpack,which was very full,but he didn`t have any other luggage．Brian needed to meet a man named Tony before he checked in for his flight．He found Tony near the Air France counter．Tony gave him a round-trip tockct and a smaii package．

　　“Give tis package to Jean-Paul at the airport in Paris．He will have a sign with your name on it．I tjink you can find him easily,”Tony said．“You don’t have any luggage,right?”

　　“Only tjis backpack,”Brian answered．“You said I could bring one carry-on bag．”

　　“That’s right,One carry-on bag is fine, Have a good trip．”

　　Thanks．”

　　Is Brian a criminal(犯罪)?Not at all．He is an air courier．And he paid only ＄110 for the round-trip ticket to Paris．Air couries get cheap airline tickets because they take important packages and papers tio foreign countries．Businesses sometimes need to get packages and papers to people in foreign countries by the next day．Often,the only way they can do this is to use an air-courier company．It is not cheap for a business to send a package with an air courier, but it is quick．

　　Every year about 80,000 people worldside travel as air couriers．The number of tickets for courier travel is growing bu about 10 percent a year．However,air-courier travel isn’t for everyone,But if you have very little money,can be flexible(灵活的)about your travel plans,and don’t mind wearing the same clothes for a week,it can be a great way to take a vacation!

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