(2013·咸阳二模)—Have you seen pen？I left it here this morning.—Is it black one？I found it in

(2013·咸阳二模)—Have you seen pen？I left it here this morning.
—Is it black one？I found it in the corner.
A. a；the
B. the；the
C. a；a
D. the；a

(答案→)A. a；theB. the；theC. a；aD. the；a解析：第一次提到某物用不定冠词，所以第一空填a；根据I found it in the corner这一信息，它表明说话者是拿着笔在与对方说话，故表特指，所以第二空填the。

谢谢了