题目内容
A little boy wrote ________“U”and ________“n”on the wall.
[ ]
A.a; an
B.an; a
C.an; an
D.a; a
答案:A
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题目内容
A little boy wrote ________“U”and ________“n”on the wall.
A.a; an
B.an; a
C.an; an
D.a; a