问题
选择题
—What's this in English?
—It's ______ pen. It's _______ orange pen. [ ]
A. a, a
B. a, an
C. an, a
D. an, an
答案
答案：B
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—What's this in English?
—It's ______ pen. It's _______ orange pen. [ ]
A. a, a
B. a, an
C. an, a
D. an, an
答案：B