语法与词汇
Advocates of organic foods—a term whose meaning varies greatly—frequently proclaim that such products are safer and more nutritious than others.
【正确答案】
A
【答案解析】句意：有机食品的定义多种多样，而倡导这种食品的人们频繁宣称其产品比其他食物更安全富含更多营养。advocate提倡者，支持者。proponent支持者；建议者。两者意思相近。merchant商人；店主。inspector检查员，巡视员。