单项选择题

A．America.
B．Australia.
C．Asia.
D．Europ
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单项选择题
A．one, oneB．one, twoC．two, twoD．two, one
A．one, one
B．one, two
C．two, two
D．two, one
单项选择题
A．Now, there are no wars and people live in a peaceful world.B．More children can live to their adulthood and have their own children.C．People live longer now than in the past.D．People imunize many fatal diseases of which many people die
A．Now, there are no wars and people live in a peaceful world.
B．More children can live to their adulthood and have their own children.
C．People live longer now than in the past.
D．People imunize many fatal diseases of which many people die
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