单项选择题

Which of the following can be inferred from the passage

A．Edwin "Buzz" Aldiin is a mad man.
B．Space travel was once considered impossible and crazy.
C．Hartmut Muller is the president of German-based Space Tours.
D．Edwin "Buzz" Aldrin and Hartmut Muller are good friends.

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单项选择题

Which of the following is NOT included in the present space tourism

A．Visits to museums.
B．Visits to space camps.
C．Visits to rocket-launch recovery sites.
D．Low-gravity aircraft trips.

单项选择题

The main idea of the passage is ______.

A．facing life's tests and difficulties with courage
B．the progress of human civilization
C．the importance of children’s learning to cooperate with others
D．the early education of children