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13．Everything comes with_______ price；there is no such thing as free lunch in the world．（　�。�
A．aB．theC．anD．/

分析 所有的事情都有代價，這世上并沒有免費的午餐．

解答 正確答案：A．根據(jù)句意所有的事情都有代價，這世上并沒有免費的午餐，其中price是代價的意思，是泛指，且price首字母發(fā)輔音音素/p/，則應(yīng)填寫不定冠詞a，故選擇A．

點評 本題考查不定冠詞a，掌握其基本用法，根據(jù)題干作出選擇．

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