单项选择题

Scientists knew （） about the moon a long time ago.

A．nothing
B．many things
C．everything
D．little

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单项选择题

A．So far, rockets with men have been to Other places.
B．Rockets with men can fly to other places farther away than the moon.
C．Perhaps one day rockets will be able to go to any place in space.
D．A plane can fly to the moon.

单项选择题

The moon is （） away from the earth.

A．about 384 000 kilometers
B．240 000 kilometers
C．only 348 000 kilometers
D．about 384 000 meters