补全对话。
A: I'm anxious, because I 1 find my backpack.
B: Really? 2 did you drop it?
A: I think I 3 it during the concert.
B: So it 4 still be in the symphony hall. Go there to have a look. By the way, 5 are you so anxious?
A: Because I have a math test 6 algebra tomorrow.
B: Oh, terrible.
A: It's 7 that it counts 30% 8 the final exam.
B: I'm 9 to hear that.
A: 10 you have any ideas, please call me.
B: OK. I will.
