Space- based solar power will rule out other forms of renewable energy sources.

• A、Right
  
  

• B、Wrong
  
  

• C、Not mentioned
  
  

As it is mentioned in the 4th paragraph, gaps have grown dramatically between        .

• A、the talented students and the slow ones
  
  

• B、the advanced countries and the others
  
  

• C、the selective institutions and the rest
  
  

• D、the rich families and the poor ones
  
  

第七部分:短文写作(第51题,30分)

51.请根据下列材料写一篇150 词左右的英语短文。

We cannot fail to notice that countless uncivilized behaviors exist in our daily lives, such as spitting, talking loudly, littering, saying nasty words in public places and so forth. What will you do in public?