6．The cost of organic food is higher than ___________ of conventional food because the organic price tag reflects more closely the true cost of growing the food．（　�。�
A．itB．oneC．thisD．that

分析 有機(jī)食品的成本比傳統(tǒng)食品高得多，因?yàn)橛袡C(jī)價(jià)格標(biāo)簽更真實(shí)地反應(yīng)了種植中的食物的真正成本．

解答 答案：D 考查指示代詞用法．根據(jù)題意及句子結(jié)構(gòu)，此處要填一個(gè)能代替不可數(shù)名詞cost的代詞，that指代同類而不是同一事物．故選D．one也指代同類而不是同一事物，但只能代替可數(shù)名詞；it指代同類同物；this指鄰近的人或物．

點(diǎn)評(píng) 解答此類問(wèn)題，要弄清楚各個(gè)代詞的詞義及用法，根據(jù)題意及上下文選擇最合適的答案．

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