问题
选择题
—Is it ________ leg?
—No, It's ________ arm.[ ]
A. an; an
B. a; a
C. an; a
D. a; an
答案
答案：D
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—Is it ________ leg?
—No, It's ________ arm.[ ]
A. an; an
B. a; a
C. an; a
D. a; an
答案：D