Passage One

　　Questions 21 to 25 are based on the following passage.

　　The Food and Drug Administration said on Wednesday that it is trying to track down as many as 386 piglets that may have been genetically engineered and wrongfully sold into the U.S. food supply.

　　The focus of the FDA investigation is on pigs raised by researchers at the University of Illinois in Urbana Champaign. They engineered the animals with two genes: one is a cow gene that increases milk production in the sow; the other, a synthetic gene, makes the milk easier for piglets to digest. The goal was to raise bigger pigs faster.

　　There has been no evidence that either genetically altered plants or animals actually trigger human illness, but critics warn that potential side effects remain unknown. University officials say their tests showed the piglets were not born with the altered genes, but FDA rules require even the offspring of genetically engineered animals to be cet6w.com won't get into the food supply.

　　The FDA, in a quickly arranged news conference on Wednesday prompted by inquiries by USA TODAY, said the University of Illinois would face possible sanctions and fines for selling the piglets to a livestock broker, who in turn sold them to processing plants.

　　Both the FDA and the university say the pigs that entered the market do not pose a risk to consumers. But the investigation follows action by the U.S. Department of Agriculture in December to fine a Texas company that contaminated 500,000 bushels of soybeans with corn that had been genetically altered to produce a vaccine for pigs.

　　Critics see such cases as evidence of the cet6w.com oversight of a burgeoning (新興的) area of scientific research. “This is a small incident, but it's incidents like this that could destroy consumer confidence and export confidence,” says Stephanie Childs of the Grocery Manufacturers of America. "We already have Europe shaky on biotech. The countries to which we export are going to look at this. "

　　The University of Illinois says it tested the DNA of every piglet eight times to make sure that the animal hadn't inherited the genetic engineering of its mother. Those piglets that did were put back into the study. Those that didn't were sold to the pig broker. "Any pig that was tested negative for the genes since 1999 has been sent off to market," says Charles Zukoski, vice chancellor for research.

　　But FDA deputy commissioner Lester Crawford says that under the terms of the university's agreement with the FDA, the researchers were forbidden to remove the piglets without FDA approval. “The University of Illinois failed to check with FDA to see whether or not the animals could be sold on the open market. And they were not to be used under any circumstance for food. "

　　The FDA is responsible for regulating and overseeing transgenic animals because such genetic manipulation is considered an unapproved animal drug.

　　21. The 386 piglets wrongfully sold into food supply are from ______.

　　(A) Europe (B) an American research organization

　　? a meat processing plant (D) an animal farm

　　22. The purpose of the transgenic engineering research is to ______.

　　(A) get pigs of larger size in a shorter time (B) make sows produce more milk

　　? make cows produce more milk (D) make pigs grow more lean meat

　　23. The 4th paragraph shows that the University of Illinois ______.

　　(A) was criticized by the FDA (B) is in great trouble

　　? is required by the FDA to call back the sold piglets (D) may have to pay the penalty

　　24. The FDA declares that the wrongfully sold piglets ______.

　　(A) may have side effects on consumers (B) may be harmful to consumers

　　? are safe to consumers (D) may cause human illness

　　25. It can be inferred from this passage that ______.

　　(A) all the offspring have their mothers' genetic engineering

　　(B) part of the offspring have their mothers' genetic engineering

　　? none of the offspring have their mothers' genetic engineering

　　(D) half of the offspring have their mothers' genetic engineering

　　Passage One

　　文章精要：文章通過講述美國食品藥物管理局(FDA)對伊利諾伊大學培育的轉(zhuǎn)基因豬的后代進入食品市場這一事件進行的調(diào)查， 指出應加強對動植物進行轉(zhuǎn)基因?qū)嶒灥谋O(jiān)管。

　　21. B 推斷題。第一段指出FDA想要找到被不正當?shù)刭u入美國食品市場的仔豬; 第二段第一句又指出， FDA調(diào)查的焦點是位于Urbana Champaign的伊利諾伊大學的科研人員飼養(yǎng)的豬， 由此可知， B正確。雖然文章提到了processing plants， 但干擾項C用的是單數(shù)， 那么多仔豬不可能只賣給一家加工廠， 故排除。

　　22. A 細節(jié)題。文章第二段最后一句指出， 該試驗的最終目的是更快地培育出更大的豬， 由此可知， A正確。

　　23. D 推斷題。文章第四段提到， FDA在一個新聞發(fā)布會上宣稱， 伊利諾伊大學因其售豬行為將面臨制裁(sanctions)和罰款(fines)。D項“將可能被迫交納一筆罰金”與之相符， 所以D正確。

　　24. C 細節(jié)題。通觀全文， 似乎都是對動物轉(zhuǎn)基因?qū)嶒灢焕�的�?nèi)容， 但細讀文章可知， FDA的舉措只是為了防范未知的可能危害。第五段首句更明確指出， FDA和伊利諾伊大學均聲稱進入市場的仔豬不會對消費者構成威脅， 所以C正確。

　　25. B 推斷題。第七段提到， 伊利諾伊大學稱， 每頭仔豬都做了八次檢驗以確保它們沒有轉(zhuǎn)基因遺傳， 若檢出帶有轉(zhuǎn)基因遺傳的則被送回用于研究， 由此可推斷B正確， 即部分仔豬攜帶母豬的遺傳基因。