B. You can't be too cautious when facing life choices.

　C. It is who you are rather than what you look like that counts.

　D. It is worthwhile to experience something interesting and creative.

To most of us, medicine comes from a drugstore. But originally, much of the medicine developed in the last century came from natural sources: plants or bacteria. Now, a group of scientists in Great Britain are hoping to develop a medicine from poisonous insects. They are researching whether the deadly venom（毒液）of some insects can work against bacteria.

　　Venom tech laboratory

　　About 400 insects live in plastic containers in the Venomtech laboratory. Each container has an image of a skull and crossbones. The images warn that a bite from the insects inside can be anything from painful to deadly.

　　The venom from these insects contains hundreds of chemical components. Each component has a different target and effect. Medical researchers separate the venom into its component parts. Then they create a library of those components, looking for the ones that could be turned into new drugs.

　　"Some of them we found can kill bacteria, like E Coli, so they're very relevant at the moment where modern medicines are failing. And we're also finding venom that is changing and killing cancer cells."

　　Finding new ways to kill bacteria is important to researchers. One reason is that people have used antibiotics (抗生素)so much that some bacteria can now resist it. For example, tuberculosis used to be curable with antibiotics. Now it is not.

　　How do they get the venom out? To get as much venom as possible, researchers feed the insects well and then put them to sleep temporarily. Steven Trim of Venomtech says researchers anaesthetize the insects to make removing the venom safer. After all, an immobile insect cannot bite. Researchers then electrically stimulate the insect to contract(收缩)the muscle and squeeze the gland(腺). The pressure produces a small amount of venom.

　　Researchers separate the venom into hundreds of proteins. Each protein contains between one and five different molecules (分子). Someday, those tiny molecules might be turned into powerful new drugs.

27. The skull and crossbones images in plastic containers are used to____________.

　A. warn people B. comfort people

　C. frighten people D. encourage people

28. What does the underlined word "anaesthetize" probably mean?

　A. To kill something dangerous. B. To remove something harmful.

　C. To protect something beneficial. D. To make something unconscious.

29. What can we learn from the research?

　A. Tuberculosis is curable with antibiotics.

　B. The venom from the insects can cure cancer diseases.

　C. Some of the components from venom can kill bacteria.

　D. The chemical components from venom can be turned into new drugs.

30. The researchers get venom from poisonous insects by ____________.

　A. making them sleep for some time B. squeezing the gland containing antibiotics

　C. separating the venom into proteins D. stimulating the insects to relax the muscle

第二节（共5小题；每小题2分，满分10分）

　　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。

In different countries around the world, people become "adults" at different ages. Being an adult means having the right to do certain things such as getting a part-time job, voting, getting married, or getting a license to drive. 31