问题
选择题
This is _____ apple and that's_____ pear. [ ]
A. a, an
B. an, a
C. an, an
D. a, a
答案
答案：B
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This is _____ apple and that's_____ pear. [ ]
A. a, an
B. an, a
C. an, an
D. a, a
答案：B