问题
选择题
One day, people will fly ___________ Mars __________ vacation.[ ]
A. to; to
B. for; for
C. to; for
D. for; to
答案
答案：C
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One day, people will fly ___________ Mars __________ vacation.[ ]
A. to; to
B. for; for
C. to; for
D. for; to
答案：C