语音讲解：
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　　语音讲解：

　　Lynn: Why is there never a bus when you want one?

　　Sam: Good question. There aren't enough buses on this route.

　　Lynn: Sometimes I feel like writing a letter to the paper.

　　Sam: Good idea. You should say that we need more subway lines, too.

　　Lynn: Yeah. There should be more public transportation in general.

　　Sam: And fewer cars! There's too much traffic.

　　Lynn: Say, is that our bus coming?

　　Sam: Yes, it is! But look. It's full!

　　Lynn: Oh, no! Let's go and get a cup of coffee. We can talk about this letter I'm going to write.

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