— Have you seen pencil? I left it here this morning．
—Is it black one? I think I saw it somewhere．
A. a; the
B. the; the
C. the; a
D. a; a
网友回答
A. a; the
B. the; the
C. the; a
(答案→)D. a; a
解析：考查冠词，当第一次出现某物时，用不定冠词a/an；当再一次出现时，用定冠词the，句子意思“你见过一支铅笔吗？昨天上午忘在这了。是不是一只黑色的铅笔？我想我在某个地方见过”，所以选D