Before closing,a plant should put up a notice and keep it for 90 days.

• A、True
  
  

• B、False
  
  

• C、Not Given
  
  

Task 2

21. Some form of ideal society is       

22.Books written by J. Verne are       

23.People enjoy       

24 Works of modern science fiction have       

25.Writers find it difficult       

A. a recurrent theme

B. to keep ahead of scientific advances

C. reading books of science fiction

D. political implications

E. a current theme

F. read worldwide

According to the passage, how many major networks are there?

• A、Two.
  
  

• B、Three.
  
  

• C、Four.
  
  

• D、Five.