Passage Three Questions 32 to 35 are based on the passage you have just heard.

A．The changes of life styles have no influence on business.
B．Different people may have completely different life styles.
C．It’s doubtful what life styles are changing.
D．Life styles of different people are the same.

A．Because they need more protein than vegetables can supply.
B．Because they cannot digest vegetables.
C．Because they use more energy than adults.
D．Because they cannot easily digest milk and milk products.