B. Listen to the short dialogues and choose the best answer to each question you hear（根据听到的短对话和问题，选出最恰当的答案）
() 6. A. The Summer Palace. B. The Palace Museum.
C. The Suzhou Museum. D. The National Museum.
() 7. A. It is the tallest in the city.
B. It is covered with trees and plants.
C. Each floor is built without any nails.
D. It is made of plastic bottles.
() 8. A. Tom forgot his homework.
B. There is too much rubbish on the street.
C. The air outside smells bad.
D. Tom missed the bus.
() 9. A. Plant trees in the park.
B. Pick up plastics on the beach.
C. Make posters about saving water.
D. Visit a recycling centre.
() 10. A. Boring. B. Tiring.
C. Wonderful. D. Terrible.

6. B 7. B 8. C 9. B 10. C

C. Listen to the passage and choose the best answer to each question you hear（根据听到的短文，选出最恰当的答案）
() 11. A. In Paris. B. In Milan.
C. In London. D. In Shanghai.
() 12. A. In 2004. B. In 2010.
C. In 2014. D. In 2020.
() 13. A. About 100. B. About 800.
C. More than 2, 000. D. More than 20, 000.
() 14. A. Because they block strong winds.
B. Because they give shade and clean the air.
C. Because they store rainwater.
D. Because they make the building lighter.
() 15. A. A famous Italian artist.
B. A green building and its features.
C. The history of Milan.
D. How to plant trees in cities.

11. B 12. C 13. D 14. B 15. B