【正确答案】 B

【答案解析】[听力原文]
Some people are calling it the greatest medical breakthrough so far this century. Surgeons in Spain have successfully carried out the world"s first organ transplant using new stem cell technology.
But what are stem cells? Most cells in our bodies are designed to serve specific purposes—for example, a liver cell develops to work in the liver and cannot become a heart cell. But stem cells are different. They are very young, and in the laboratory scientists can grow them into different types of cell. Currently, transplant patients have to take drugs for the rest of their lives to prevent their bodies rejecting the new organs. These drugs can have bad side-effects, and do not always prevent rejection. But by using Ms Castillo"s own cells, doctors were able to trick her body into thinking the new part was her own organ. Five months on, Claudia Castillo is in perfect health. This ground-breaking procedure could be used in other transplant operations in the future. Scientists also believe stem cells might be used to treat Parkinson"s disease, Alzheimer"s disease, heart disease, stroke, and bums.
However, stem cell research is extremely controversial. The most effective stem cells do not come from adults but from embryos created in laboratories and which are just a few days old. Many people have religious or ethical objections to growing embryos, even if they can be used to cure diseases.

What makes stem cells so special?

[解析] 短文中提到They are very young, and in the laboratory scientists can grow them into different types of cell. 由此可知，干细胞可以发展成为各种不同的器官。因此答案为选项B。

【正确答案】 D

【答案解析】[听力原文]
What must organ transplant patients do after the operation?

[解析] 短文中指出Currently, transplant patients have to take drugs for the rest of their lives to prevent their bodies rejecting the new organs. 由此可知，为了避免排斥反应，病人必须终生按时服药。因此答案为选项D。

【正确答案】 B

【答案解析】[听力原文]
Why do some people disagree with the use of stem cells in disease treatment?

[解析] 此题针对人们反对使用干细胞的原因进行提问。短文中说Many people have religious or ethical objections to growing embryos, even if they can be used to cure diseases. 由此可知，宗教和伦理方面的考虑促使一些人反对干细胞的使用。因此答案为选项B。