题目内容
—What are you doing there?
—I'm going hiking _______ the mountains. I like going there _______ vacation.
—I'm going hiking _______ the mountains. I like going there _______ vacation.
[ ]
A. in, for
B. on, to
C. in, to
D. on, for
B. on, to
C. in, to
D. on, for
A
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