“Have you seen pen? I left it here this morning.” “Is it black one? I found it in the co

问题补充：

“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：

(答案→)A. a, the

B. the, the

C. a, a

D. the, a

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