12．It will make           difference if we declare         war on food waste．（　　）
A．/； aB．a； theC．a；/D．the； a

分析 如果我們向食品浪費宣戰(zhàn)那么結(jié)果將大不同．

解答 答案：C．
make a difference為固定搭配，表示"有意義，起作用"；declare war on sth意為"向…宣戰(zhàn)"，也是一種固定表達，所以使用零冠詞；故選C．

點評 對于冠詞一類的題目，只要認真分析文中所指的名詞為泛指還是特指，并結(jié)合句中短語是否為固定搭配，則可以輕松地選出答案．

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