The main purpose of the passage is to___________ 

• A、discuss the advantages and disadvantages of skyscrapers
  
  

• B、compare skyscrapers with other modern structures
  
  

• C、describe skyscrapers and their effect on the environment
  
  

• D、illustrate various architectural designs of skyscrapers
  
  

假设你的美国朋友Mike要去你的家乡旅游，请给他写一封电子邮件，告诉他:

1. 近期的天气情况；

2. 需要注意的事项；

3. 你期待与他见面。

请以 Like 署名

Which of the following groups would the skyscraper issue most concern?

• A、Electricians.
  
  

• B、Environmentalists.
  
  

• C、City planners. 
  
  

• D、Television viewers.