问题描述：
--- Could you tell us ______ to travel from Earth to Mars by spacecraft?
--- It takes months, I think.
A. how far it takes B. how long it takes
C. how long does it take D. how soon does it take
能给我讲讲吗?
--- It takes months, I think.
A. how far it takes B. how long it takes
C. how long does it take D. how soon does it take
能给我讲讲吗?
问题解答：
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