— 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：句意：你有没有见到一只铅笔？我今天上午落在这儿了。它是一只黑色的吗？我想我在哪里见到它了。不定冠词a/an表示泛指，故选D