11．People who drink and drive are         danger both to themselves and to         others．（　�。�
A．a；\B．\；theC．the；theD．the；\

分析 喝酒開車的人對自身和他人都是一種危險．

解答 答案：A
題干中danger是抽象名詞，在句中表示類指，相當于a kind of danger一種危險；others表示泛指，相當于other people．故選A．

點評 冠詞是一種虛詞，本身不能獨立使用，只能放在名詞前幫助說明名詞所指的人或事物，它是英語詞性中最小的一類，只有三個，一種是不定冠詞a，an；一種是定冠詞the．此外也有些特定場合不用冠詞，即通常所稱的零冠詞．不定冠詞表示泛指，定冠詞表示特指．

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