A．is not meant for produce of all producers

　　B．makes it a must to attach a USDA Organic label

　　C．sets restrictions on the sales of organic produce

　　D．requires all foods to satisfy the strict government standards

　　解析：选A　细节理解题。根据最后一段可知，并非所有农产品的生产商都要给他们的产品进行有机认证。

　　Ⅱ.语法填空

　　Tuan was a farmer. For decades, he __1__ (struggle) to rid his family __2__ hunger. However, __3__ always confused him __4__ to expand the output of his crops. This __5__ (disturb) problem led to his regretting being a farmer. He would rather have chosen another job.

　　One day, when __6__ (skim) through a newspaper, Tuan read a comment on Yuan Longping. He underlined Yuan's nationality and occupation, and then focused on his discovery and the statistics of his research. He found the knowledge Yuan circulated very __7__ (practice). Therefore, he made a summary and began to build up a new farming method. He planted super grain of rich nutrition and equipped __8__ (him) to keep his crops roots free from bacteria and pests. He also enriched minerals in the soil while reducing chemical fertilizers. Though it cost him more time and freedom, he was full of hope.

　　The next year, Tuan was sunburnt but __9__ (satisfy) with his production very much. __10__ (thank) to Yuan Longping, he not only won the battle against hunger, but he could also export his crops abroad.

　　语篇解读：本文是一篇记叙文。介绍了一位农民受到袁隆平的激励而努力研制农业新品种，提高农作物产量的故事。

　　1．had been struggling　根据For decades和was可知应用过去完成进行时。

　　2．of　rid sb. of ..."摆脱，除去"。

　　3．it　it为形式主语。

　　4．how　"how to expand the output of his crops"是真正的主语。

　　5．disturbing　用形容词来修饰后面的名词problem，意为"令人烦恼的"。

　　6．skimming　此处为状语从句的省略，补全句子为"when (he was) skimming ..."。

　　7．practical　形容词practical作宾语knowledge的补足语。

8．himself　和主语He为同一人，此处用反身代词加强语气。