问题
选择题
It's _____ apple. It isn't _____melon. [ ]
A. a; an
B. a; a
C. an; a
D. an; an
答案
答案：C
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It's _____ apple. It isn't _____melon. [ ]
A. a; an
B. a; a
C. an; a
D. an; an
答案：C