The twins in the study differed in（   ）

• A、sleeping habits
  
  

• B、Exercise frequency.
  
  

• C、working hours .
  
  

• D、food preference
  
  

Some people help the wild dogs to survive the cold winter.

• A、True
  
  

• B、False
  
  

• C、Not Given
  
  

Task 1:

16、Para（   ）

17、Para（   ）

18、Para（   ）

19、Para（   ）

A.Taking good care of yourself.

B.Staying in bed for the entire day.

C.Taking your attention away from illness.

D.Knowing where and how to get medicine.

E.Informing friends and family of your illness.