问题
选择题
I often do exercise ______ the morning, but ______ Sunday morning I watch TV. [ ]
A. in; on
B. on; in
C. in; at
D. on; at
答案
答案：A
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I often do exercise ______ the morning, but ______ Sunday morning I watch TV. [ ]
A. in; on
B. on; in
C. in; at
D. on; at
答案：A