问题
选择题
He is _______ unusual writer and he wrote _______ useful book.
[ ]
A. a; an
B. a; a
C. an; an
D, an; a
答案
答案：D
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He is _______ unusual writer and he wrote _______ useful book.
[ ]
A. a; an
B. a; a
C. an; an
D, an; a
答案：D