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

Rockets with men in them have reached()

A．the sun
B．the moon
C．all the stars
D．some planets

单项选择题

Which of the following is right()

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.