For safety, Internet users are advised to

• A、test shared Internet access
  
  

• B、rely on paid Internet access
  
  

• C、look for free Internet access
  
  

• D、avoid shared Internet access
  
  

21. Nuzzel helps me _____

22. On twitter I am able _____

23. There are several factors that_____

24. Before my kids go to school, I_____

25. I call my parents_____

A. to listen to others

B. step into my office

C.kiss them goodbye.

D. affect my workout routine

E.to learn how they going

F.to surf the Internet efficiently

Animals would start a fierce fight over food in ancient time.

• A、True
  
  

• B、False
  
  

• C、Not given