题目内容
He used to be ________ UNICEF worker, but now he is really ________ excellent basketball player.
A. an; an B. a; an C. a; the D. the; an
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题目内容
He used to be ________ UNICEF worker, but now he is really ________ excellent basketball player.
A. an; an B. a; an C. a; the D. the; an