—Have you ever seen pen? I can’t find my pen anywhere.Is it blue one? It is under the

—Have you ever seen pen? I can’t find my pen anywhere.
--Is it blue one? It is under the book.
A. a; the
B. the; a
C. a ; a
D. the ; the

A. a; the B. the; a (答案→)C. a ; aD. the ; the解析：此题考查冠词的基本用法，a和an是不定冠词表示泛指；the定冠词表示特指。

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