题目内容

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,  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.
1. can't 2. where 3. lost 4. must 5. why
6. on 7. crucial 8. to 9. sorry 10. when
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