听一段材料，回答下面几个小题。
When will the Burj Dubai be completed?
A.In 2010.    B.In 2009.    C.In 2008.
Where is the center of the tallest buildings at present?
A.In Europe and the Middle East.
B.In North America and Asia.
C.In Asia and the Middle East.
Why do people build so many tall buildings?
A.Tall buildings are wonderful to look at.
B.Tall building save more resources.
C.People like to live in tall buildings.
What is the height of the Empire State Building?
A.About 400 meters.
B.About 200 meters.
C.About 300 meters.