填空题. A. it's full B. Good question C. I bet that was fun D. Good idea E. I used to F. fewer cars G. Look H. Hey A: Why is there never a bus when you want one? B: 1 . There aren't enough buses on this route. A: Sometimes I feel like writing a letter to the paper. B: 2 . You should say that we need more subway lines, too. A: Yeah. There should be more public transportation in general. B: And 3 ! There's too much traffic. A: 4 , is that our bus coming? B: Yes, it is. But look, 5 . A: Oh, no! Let's go and get a cup of coffee. We can talk about the letter I'm going to write.