—— Have you seen___pen? 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 |
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—— Have you seen___pen? 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 |