单项选择题
A．the sun B．the moon C．all the stars D．some planets
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.
A．at the beginning of the nineteenth century B．in the middle of the nineteenth century C．more than two hundred years ago D．when people first sent letters and postcards.