单项选择题

A．Retirement Guide.
B．How to Estimate Life Expectancy.
C．The Youngest Baby Boomers.
D．How to Live Longer.
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单项选择题
A．Working late.B．Unbalanced diet.C．Worrying.D．Eating too much.
A．Working late.
B．Unbalanced diet.
C．Worrying.
D．Eating too much.
单项选择题
A．Because it can treat emotional problems and stone kinds of cancer.B．Because it can make stores brighter.C．Because it can make skin tender.D．Because people want to stay away from dark places.
A．Because it can treat emotional problems and stone kinds of cancer.
B．Because it can make stores brighter.
C．Because it can make skin tender.
D．Because people want to stay away from dark places.
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