单项选择题

A．though
B．as
C．whether
D．if
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单项选择题
A．To help one deal with stress.B．To help one keep fit.C．To help one with sleeping problem.D．To keep one from being too busy.
A．To help one deal with stress.
B．To help one keep fit.
C．To help one with sleeping problem.
D．To keep one from being too busy.
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