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

A．People should get reward to be encouraged to behave well
B．Our behavior would be greatly influenced by changes in our environment.
C．Economists and psychologists hadn’t been paying much attention to the smell changes.
D．People often neglected environment changes.

A．The participants were investigated for 6 years between ages 51 to 61.
B．The participants answered questions at the start of the study.
C．The participants who kept working were in better shape than the others.
D．All kinds of jobs would be good for people as long as they kept working.