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

He had to try to make the call in the middle of the night, it was hard to communicate using only a what? Choose the most suitable option to answer the above question. Options：  A. communicating  B. response  C. yelling  D. hanging up  E. whisper
E

What would use an account book? Choose the most suitable option to answer the above question. Options：  A. desk drawer  B. purse  C. bank  D. keep accounts  E. keep track of emails
C