问题
选择题
Mike does his exercises ____ seven _____ the evening.[ ]
A. on; to
B. at; in
C. by; of
D. at; on
答案
答案：B
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Mike does his exercises ____ seven _____ the evening.[ ]
A. on; to
B. at; in
C. by; of
D. at; on
答案：B