-Have you seen pen? I left it here this morning. -Is it black one? I think I saw
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—Have youseen pen?I left it here this morning.
—Is it black one? Ithink I saw it somewhere.
A. a;the B. the; the C. the; a D. a; a
试题答案
答案：D
解析：两个人提问所提到的钢笔都不是两个人共知的，也就是说都不确定，因此用不定冠词。
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