听第8段材料，回答第10 - 12题。
10. What is the woman waiting for?
[ A] She is waiting for the man.
[B] She is waiting for her mother.
[ C] She is waiting for a bus.

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听第10段材料，回答第17 - 20题。17. What is the speaker?[ A]A guide. [B]A visitor. [C]A teacher.

A.

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