单项选择题

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

A．Because their number is growing and they are more active.
B．Because senior citizens have more experience than others.
C．Because their average life span is longer.
D．Because they do more work now.
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单项选择题
A．Your physical health.B．Your emotional health.C．Your muscle strength.D．Your blood pressure.
A．Your physical health.
B．Your emotional health.
C．Your muscle strength.
D．Your blood pressure.
单项选择题
A．The cause of the flood.B．The effects of the flood.C．The heroic fight against a flood.D．Floods of the past twenty years.
A．The cause of the flood.
B．The effects of the flood.
C．The heroic fight against a flood.
D．Floods of the past twenty years.
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