问题
选择题
—What color is it?
—It's ______ green. It's ______ green pen. [ ]
A. a, a
B. /, a
C. a, /
D. an, an
答案
答案：B
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—What color is it?
—It's ______ green. It's ______ green pen. [ ]
A. a, a
B. /, a
C. a, /
D. an, an
答案：B