In ____ accident _____ knowledge of first aid can make _____ real difference.
A．a(chǎn)n; a; aB．the; a; theC．a(chǎn)n; the; 不填D．a(chǎn); a; 不填
A

試題分析：句意：在一個(gè)事故中，急救的知識(shí)真的有很大差別。第一個(gè)空，表示泛指，且“accident”首字母發(fā)音是元音，故用不定冠詞an ；第二個(gè)空表示泛指，且“knowledge”首字母發(fā)音是輔音，故用不定冠詞a ；第三個(gè)空，make a difference 是固定用法，意思是有差別，有關(guān)系。選A。
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