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

Dogs bury their favorite bones or chew toys by nature

• A、True
  
  

• B、False
  
  

• C、 Not given
  
  

The backyard of a dog owner may be full of holes dug by his dog

• A、True
  
  

• B、False
  
  

• C、Not given