单项选择题

The explorers in H. G. Wells's story were surprised to find that the "moon people"

A．knew so much about the earth
B．understood their language
C．lived in so many underground cities
D．were ahead of them in space technology
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单项选择题
What does the underlined word it in the second paragraph refer to
A．Discovering the moon's inner space.
B．Using the earth's inner space.
C．Meeting the "moon people".
D．Traveling to outer spac
单项选择题
What sort of underground systems are already here with us
A．Offices, shopping areas, power stations.
B．Tunnels, car parks, shopping areas.
C．Gardens, car parks, power stations.
D．Tunnels, gardens, offices.
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