Question 13. Although he is___________, he is always happy and optimistic.
A. disabled B. energetic
C. rich D. interested
Question 14. She is totally dedicated_____her work.
A. by B. on
C. to D. for
Question 15. ______________System lets us break down the food we eat and turn it into energy.
A. Respiratory B. Nervous
C. Digestive D. Skeletal