外科医生成功将猪心脏植入人体

David Bennet comes from Maryland, US. He is 57 years old. He is very ill. He needs a new heart. Sadly, he cannot get a heart from another person. Luckily, he can get a pig heart. The pig is genetically-modified(基因改造的).

Doctors in Maryland did the operation(手术). The operation lasted seven hours long. It was dangerous. It was never successful in the past. And it was the last chance(机会) for Bennet. Luckily, he survived the operation. He is now doing well. But doctors do not know how long he can live.

Such operations are not usual. Doctors need to get special permission. The permission means that a US official says that they can do the operation.

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1.Where did the story happen?

A In France.

B In the UK.

C In Australia.

D In the USA.

解析：选D。D 细节理解题。根据第一段“David Bennet comes from Maryland, US.”和第二段“Doctors in Maryland do the operation(手术)”可知，在美国马里兰州，外科医生为病人大卫•贝内特做了手术。故选D。

2.According to the passage, the heart comes from______.

A a lab

B a pig

C a hospital

D another person

解析：选B。B 细节理解题。根据第一段的“Luckily, he can get a pig heart.”可知，幸运的是，贝内特能得到一个猪心脏。故选B。

3.What can’t we know from the passage?

A How the operation was.

B How Bennet is going now.

C How long Bennet can live.

D How long the operation lasted.

解析：选C。C 细节理解题。根据第二段的“But doctors do not know how long he can live”可知，我们不知道他能活多久。故选C。

4.The underlined word “permission” probably means______ in Chinese.

A 设备

B 培训

C 技术

D 许可

解析：选D。D 词义猜测题。根据最后一段中的“The permission means that a US official says that they can do the operation.”可知，“permission”意味着官方说他们可以进行这一手术，由此猜测permission 意为“许可，允许”。故选D。

5.What is the text mainly talking about?

A A heart illness.

B David Bennet.

C A heart operation.

D Doctors in Maryland.

解析：选C。C 主旨大意题。外科医生成功将一颗转基因猪的心脏移植到了57岁的病人大卫•贝内特(David Bennett)体内，本文也主要围绕这一手术展开叙述。故选C。