—What are you doing there? —I'm going hi
题型：选择题
问题：
—What are you doing there?
—I'm going hiking _______ the mountains. I like going there _______ vacation. [ ]
A. in, for
B. on, to
C. in, to
D. on, for
—What are you doing there?
—I'm going hiking _______ the mountains. I like going there _______ vacation. [ ]
A. in, for
B. on, to
C. in, to
D. on, for