A、Why her parents wanted to go to Gettysburg. B、Why her family’s vacation plans changed ten years ago. C、Where her family went f

M: Hi, Janet, you are so lucky to be done with your final exams and term papers. I still have 2 more finals to take.
    W: Really?
    M: Yeah, [19] So what are you doing this summer, anything special?
    W: Well, actually yeah. [19] My parents have always liked taking my sister and me to different places in the United States. You know, places with historical significance. I guess they wanted to reinforce the stuff we learned in school about history. And so even though we are older now, they still do once in a while.
    M: Oh, so where are you going this summer?
    W: Well, this summer it’s finally going to be Gettysburg.
    M: [20] Finally? You mean they never took you yet? I mean Gettysburg, it’s probably the most famous civil war site in the country. It’s only a couple of hours away. I think that would be one of the first place that they’ve taken you. I have been there a couple of times.
    W: We were going to go about ten, well, no, [21] it was exactly ten years ago, but I don’t know, something happened. I cannot remember what.
    M: Something changed your plans?
    W: Yeah, we ended up not going anywhere that year. I wrote a paper about Gettysburg last semester for a history class I was taking. Well, about the political situation in the United States right after the battle at Gettysburg, [22] so I’m eager to see the place.