----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 |