问题
选择题
－ What color is it?
－ It's _____ orange. It's _____ orange pen. [ ]
A. a, an
B. an, an
C. an, ×
D. ×, an
答案
答案：D
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－ What color is it?
－ It's _____ orange. It's _____ orange pen. [ ]
A. a, an
B. an, an
C. an, ×
D. ×, an
答案：D