根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
__1____Painkillers in a tablet can make your headache go away. Antibiotic cream（抗生膏）from a tube can prevent your cuts from becoming infected. But can medicine come packaged in chicken eggs?
A team of scientists from Scotland says yes. They've engineered special chickens that lay eggs with disease-treating drugs inside.
_2____Animals make thousands of proteins—they’re the main ingredient in skin, hair, milk, and meat. Since animals can make proteins easily, they’re good candidates for making protein drugs.
Researchers have already made cows, sheep, and goats that pump out protein drugs in their milk. But chickens are not expensive to take care of; what’s more, they need less room, and grow faster than these other animals. “ __3____”says Simon Lillico of the Roslin Institute near Edinburgh, Scotland.
Lillico and a team of researchers changed chickens’ DNA—the code that tells cells how to make proteins so that the birds’ cells made two protein drugs. __4____
The scientists altered the chickens’ DNA so that the birds made these drugs only in their egg whites (蛋清). This protects the chickens’ bodies from the drugs’ possible harmful effects and makes it easy for scientists to collect the drugs.
These special chickens can pass on their drug-laying abilities to their chicks. __5____ The scientists need to improve these chickens before they roost (栖息) in drug companies’ labs. The birds don’t make enough drugs to treat people yet. But once the researchers perfect their technique, you might eventually take your medicine sunny-side up.
A．Medicine comes in lots of different uses.
B．Those qualities could make chickens a better choice to become living drug factories.
C．So far, the Scottish researchers have bred five generations of drug—producing birds.
D．Some chickens are found having the ability of treating diseases.E. One drug can treat skin cancer, and the other treats a nerve disease called multiple sclerosis(硬化).
F. These drugs are made of molecules called proteins.
G. Medicine comes in lots of different packages.
小题1:G
小题2:F
小题3:B
小题4:E
小题5:C
题目分析：
小题1:根据后面的句子：But can medicine come packaged in chicken eggs?
可知药的包装各种各样：答案是：G
小题2:根据后面的句子：Animals make thousands of proteins—they’re the main ingredient in skin, hair, milk, and meat.可知这些药是蛋白质分子组成的，答案是：F
小题3:根据前面的句子：可知药的这些特点使它成为药厂的很好的选择，答案是：B
小题4:根据前面的句子：the code that tells cells how to make proteins so that the birds’ cells made two protein drugs可知下面介绍这两种药物，答案是：E
小题5:根据前面的句子：These special chickens can pass on their drug-laying abilities to their chicks.可知科学家已经繁殖了五代可以做药的鸡了。答案是：C
点评：在答题中，应首先略读一下短文，了解一下短文的大致意思，然后把几个选项含义理解透，尤其注意意思相近，表达有交叉的选项之间的区别。然后再细读短文，把答案填入合适位置。答题时可以把含义相近的几个选项轮流填入同一处位置，反复阅读，反复体会，找出最佳选项，对于实在没有把握的小题可以留待最后完成。完成短文后，再认真通读一遍全文，看看上下语意是否通顺，是否符合逻辑关系。
