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【参考答案】

have —having
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单项选择题
A．the workout involve various jumpsB．one does not use an elevator but climbs stairsC．one walks to run most of the errandsD．one switches from being inactive to active
A．the workout involve various jumps
B．one does not use an elevator but climbs stairs
C．one walks to run most of the errands
D．one switches from being inactive to active
填空题
natural
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