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Doctors have identified a powerful bacteria that cannot be killed with antibiotics. The bacteria, called a superbug, was found in a woman from Pennsylvania. Tom Frieden is the head of the US Centers for Disease Control and Prevention. He says this new bug is resistant to every antibiotic available, including colistin. Colistin is used only as a last measure, as the drug can cause organ damage. The woman is infected with a rare kind of E. coli bacteria known as CRE. The version she has includes a gene that is resistant to colistin. This is its first appearance in the United States. Researchers wrote that the case could signal the development of a truly pan-drug resistant bacteria. Health officials consider CRE, nightmare bacteria. They can kill up to 50 percent of infected patients.

Frieden expressed his concern about losing antibiotics, what he calls "miracle drugs." He said, “We know now that the more we look, the more we're going to find. And the more we look at drug resistance, the more concerned we are. We need to do a very comprehensive job protecting antibiotics so that we can have them and our children can have them. We need to make new antibiotics, but unless we have better stewardship and better identification of outbreaks, we are going to lose these miracle drugs. The medicine cabinet is empty for some patients. It is the end of the road for antibiotics unless we act urgently.” As bacteria that resist antibiotics spread, treatment for such infections could be seriously limited. Scientists and public health officials have warned that usual medical operations, minor infections and pneumonia could become deadly or very difficult to treat.

1.A powerful bacteria that cannot be killed with ______.

A antibiotics

B medicine

C colistin

D pills

解析：选A。细节理解题。根据第一段第一句Doctors have identified a powerful bacteria that cannot be killed with antibiotics.可知，故选A。

2.It is the _____ appearance of the super bacteria in the United States.

A first

B second

C third

D fourth

解析：选A。细节理解题。根据第一段倒数第三句This is its first appearance in the United States.故选A。

3.The researchers ______ losing antibiotics.

A are excited about

B are worried about

C are angry with

D are surprised at

解析：选B。细节理解题。根据第二段第二句We know now that the more we look, the more we're going to find. And the more we look at drug resistance the more concerned we are. We need to do a very a comprehensive job protecting antibiotics so that we can have them and our children can have them.故选B。

4.What’s the Chinese meaning of the underlined word “resistant”?

A 清除.

B 抵御.

C 反对.

D 打扰.

解析：选B。细节理解题。该细菌可以“抵御”包括粘菌素在内的任何医用抗生素，故选B。

5.The passage may be from _____.

A the music magazine

B the health magazine

C the traveling magazine

D the sports magazine

解析：选B。文章出处题。这是一篇关于健康的文章，在健康杂志上可以看到，故选B。