问题
选择题
Mary is going ____ December and she's staying ____ a week. [ ]
A. on, for
B. in, for
C. at, for
D. at, in
答案
答案：B
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Mary is going ____ December and she's staying ____ a week. [ ]
A. on, for
B. in, for
C. at, for
D. at, in
答案：B