单项选择题

A．Wearing arm weights while you are swimming.
B．Jogging energetically in one place for a long time.
C．Using bicycles that require you to use both your arms and legs.
D．Walking slowly while swinging your arms back and forth.
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单项选择题
A．She doesn’t want to make a bad first impression.B．She is afraid of getting off the subject.C．She is afraid they won’t listen.D．She knows that they can’t do anything about it.
A．She doesn’t want to make a bad first impression.
B．She is afraid of getting off the subject.
C．She is afraid they won’t listen.
D．She knows that they can’t do anything about it.
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