问题
选择题
The little boy wrote _______ "U" and ________ "N" on the wall.[ ]
A. a; an
B. an; a
C. a; a
答案
答案：A
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The little boy wrote _______ "U" and ________ "N" on the wall.[ ]
A. a; an
B. an; a
C. a; a
答案：A