A．catch escaped prisoners

　　B．find missing children

　　C．treat sick people

　　D．follow lost animals

　　答案　D

　　解析　细节理解题。从文中第二段第一句可知，芯片早已被应用到一百多万只动物身上，来跟踪它们，在走丢时找到它们，故选D。

　　6．The doctor decided to test the chips himself because

　　.

　　A．nobody would dare to try it

　　B．the chip could be used for identification purposes

　　C．the chip had been proved successful on animals

　　D．his patients expected him to experience it first

　　答案　B

　　解析　细节理解题。从第二段第三句“He thought the dead in the disaster could have been identified if their names and other important information had been chipped.”可知答案，故选B。

　　7．We can learn from the passage that

　　.

　　A．the chip has been proven to be very successful

　　B．the use of this chip will be favored by everybody

　　C．doctors will make a lot of money by using chips

　　D．there will be a great market for chip planting in humans

　　答案　D

　　解析　推理判断题。从文中第四段最后三句话可推断，这种新产品的市场很大，应用范围很广，故选D。

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