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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