Dogs started to bury their bones when they become pets.

• A、True
  
  

• B、False
  
  

• C、Not given
  
  

Dogs use their paws to find spots for burying bones

• A、True
  
  

• B、False
  
  

• C、Not given
  
  

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