【单选题】【消耗次数:1】
3. ____teacher came in and there was _____ book in his hand.
The; a
A; the
A; a
The; the
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【单选题】 3. ____teacher came in and there was _____ book in his hand.
①  The; a
②  A; the
③  A; a
④  The; the
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①  Though
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