B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题，选出最恰当的答案): (共10分)
7. A) Noise pollution. B) Air pollution. C) Water pollution. D) Light pollution.
8. A) At the bank. B) At the restaurant. C) At the cinema. D) At home.
9. A) The grey one. B) The light blue one.
C) The dark blue one. D) The dark green one.
10. A) A doctor. B) A teacher. C) An officer. D) An engineer.
