题目内容
20.____ by a greater demand for green products,the food company has set higher standards to ensure the quality.( )A. | Driven | B. | Being driven | C. | To drive | D. | Having driven |
分析 句意:绿色食品的巨大需求促使食品公司制订了更高的标准以保证质量.
解答 答案:A
逗号之后是主句,逗号之前是非谓语动词形式.主句主语是"the food company"与所给动词"drive"构成逻辑上的被动关系,从而排除C和D.B项"Being driven"表示动作正在进行,由主句时态"has set"可知,过去动作对现在造成影响,即"过去需求巨大"导致现在"制订了更高标准",所以B项不符合;A项过去分词表示被动且已完成,符合语境.故选A.
点评 本题考查非谓动词用法.做这类题目首先根据句意判断是谓语还是非谓语,如果是分词做状语的时候,看动词与逻辑主语构成主动关系,就使用现在分词的形式;如果二者构成被动关系就使用过去分词的形式.
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