单项选择题
Passage One Questions 11 to 13 are based on the passage you have just heard.
A.Synthetic fuel. B.Solar energy. C.Alcohol. D.Electricity.
A.Beauty. B.Loyalty. C.Luck. D.Durability.
A.He’s been to Seattle many times. B.He has chaired a lot of conferences. C.He has a high position in his company. D.He lived in Seattle for many years.