单项选择题


Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．In three and a half years.
B．In four and a half years.
C．In four years.
D．In three years.
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单项选择题
What is true about the research mentioned in the beginning of the passage
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.
单项选择题
A．40.B．14.C．3.D．13.
A．40.
B．14.
C．3.
D．13.
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