问题
选择题
We study five days _____ week and on Sundays we often play _____ football. [ ]
A. a; nthe
B. 不填; a
C. an; a
D. a; 不填
答案
答案：D
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We study five days _____ week and on Sundays we often play _____ football. [ ]
A. a; nthe
B. 不填; a
C. an; a
D. a; 不填
答案：D