单项选择题

Conversation Two What is said about moon tours

A．They will be the first tours that get out of the earth’s orbit．
B．The number of tourists will be reduced．
C．They are less dangerous than traveling to Mars．

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单项选择题

Which statement below is correct

A．A few minutes is enough for tourists because of weightlessness．
B．The cost for the trip is acceptable to the general public．
C．The duration of the trip is expected to be increased．

多项选择题

Did Maria Reiche believe the Nazca Lines have something to do with outer－space visitors What was her reason