【正确答案】 C

【答案解析】[听力原文]
   W: Dad, can I go to a movie with Sharon?
   M: Yeah, sure, but wait. Weren't you supposed to get a report card sometime this past week?
   W: Well, oh yeah. Can I call Sharon now?
   M: Uh-hum. You didn't answer my question. Did you receive it or not?
   W: I love you, Dad! You're the best!
   M: Don't try to butter me up. I can guess that your answer means that you didn't do well in some of your classes?
   W: Well, my English teacher is so boring, and he blows up every time someone talks.
   M: In other words, you're not doing so well?
   W: Uh, a C... minus.
   M: Oh. Well, how are you doing in your Spanish class? You said you liked that one.
   W: Well, I do, but I forgot to turn in a couple of assignments, and I had problems on the last test. All those verbs tripped me up. I got them all mixed up in my head!
   M: Okay, and what about algebra?
   W: Ah, I'm acing that class. No sweat.
   M: Oh!
   W: Can I go now?
   M: And how are you doing in history?
   W: Oh, that's my favorite class. Mr. Jones is always passing out candy if you know the answers to his questions.
   M: Great. Now, I have a bright daughter with tooth decay.
   W: Ah, Dad. Can I go now?
   M: You can go if you answer my history question. How old am I?
   W: Uh, fifty-five?
   M: Fifty-five! You just failed a math and history test at the same time!
   W: Dad...
   M: Well, okay, but you need to come straight home from the movie.
   W: Gotta run, Dad.
   Why does the girl flatter her father by saying "You are the best"?