Question

South Korea，the country that created the world’s first cloned dog，plans to use duplicated（复制）dogs to sniff out（闻出）drugs and explosives（炸药）．

    The Korean Customs Service uncovered last Thursday seven cloned Labrador retrievers（拉布拉多猎狗）．They are trained near lncbeon International Airport，west or Seoul. The dogs were born five to six months ago after being separately cloned from a skilled drug-sniffing  dog．Officials said using cloned dogs could help reduce costs ,due to the difficulties in finding dogs that are qualified for the jobs．

    The cloning work was carried out by a team of Seoul National University scientists in 2005. They successfully created the world’s first known dog clone，an Afghan hound（猎犬）named，Snappy．The team is led by Professor Lee Byeong-chun.

   The seven new cloned male dogs are all healthy．Now，they share the same name：“Toppy”一a combination of the words “tomorrow” and“ puppy”．

    “They are active and excel in accepting the training，”said Kim Nak—seung，a trainer at

the Customs Service’s dog training center．

    In February，all seven dogs passed a behavior test aimed at finding whether they ate genetically qualified to work as sniffing dogs．Only 10 percent to 15 percent of naturally born  dogs typically pass the test．

    If the cloned dogs succeed in other tests for physical strength，concentration and sniffing  ability，they will be put to work by July next year at airports and harbors across South Korea, according to the training center．Officials say the cloned dogs could also save money．

   “We came up with the idea of dog cloning after thinking about how we can have a superior breed（品种）at a cheaper cost，”said Hur Yong—suck，head of the training center．

    Normally，only about three out of every 10 naturally born dogs it trains--at a cost of about $ 40，140 each—ends up qualifying for the job．

    Lee of Seoul National University said it cost about $ 100，000 to $ 150，000 to clone each of the seven golden Labrador retrievers．

1．What’s the main idea of the passage?

A．The first cloned dog in South Korea．

B．How to train dogs to sniff out drugs and explosives

C．Cloned dogs will be used to sniff out drugs and explosives.

D．Cloned drug-sniffing dogs will take the place of natural ones.

2．Which of the following is NOT the benefit of cloning drug—sniffing dogs?

   A．It helps to reduce costs．

   B．It’s easy to clone drug－sniffing dogs．

   C．The training effect is much better．

   D．It can help to improve quality of drug一sniffing dogs．

3．What can we learn from the passage?

   A．It’s difficult to find dogs that are qualified for drug-sniffing．

   B．The dogs are cloned from Afghan hound．

   C．The seven cloned dogs, male or female，are all healthy．

   D．The cloned dogs are good at accepting the training but are a little passive．

4．Before the cloned dogs are put to work，they must pass the following tests EXCEPT________

A．behavior test                      B．concentration test

C．physical strength test               D．mental test

Answer 1

CBAD