The dog was wild and didn't listen to its owner, the person had never given it what? Choose the most suitable option to answer the above question. Options：  A. a treat  B. guard house  C. fleas  D. punishment  E. abandoned
D

What do children feel when going to the opera? Choose the most suitable option to answer the above question. Options：  A. headache  B. fresh  C. constipated  D. confusion  E. boredom
E

If I wanted to get some oxygen, what will I get it from? Choose the most suitable option to answer the above question. Options：  A. the sky  B. air  C. earth  D. space shuttle  E. water
B

What does a person use to fight off disease? Choose the most suitable option to answer the above question. Options：  A. immune system  B. name  C. one head  D. grip  E. fingernails
A