题目

(2018·全国卷Ⅱ)The Chinese Ministry of Agriculture finds that between 2005—when the government started a soil­testing program ________ gives specific fertilizer recommendations to farmers—and 2011, fertilizer use dropped by 7.7 million tons. 答案：that/which　考查定语从句的引导词。分析前面的a soil­testing program是指物的先行词，再根据定语从句中缺少主语，后面是动词作谓语，故填that/which。

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