1．What is the main idea of this passage?

　　A．The success of animal experiments should be ensured.

　　B．A ban on the use of animals in the lab should be enforced.

　　C．Greater efforts need to be taken to reduce the number of lab animals.

　　D．Scientists should be required to share their research results with each other.

　　2．Which of the following statements is true about animals used in the lab?

　　A．America uses only about 1.1 million lab animals per year.

　　B．Europe does not use mice and rats as lab animals at all.

　　C．Britain does not use as many lab animals as China does.

　　D．Japan has limited data on the number of lab animals used each year.

　　3．Which of the following is mentionad as an alternative to replace animal experiments?

　　A．Statistical studies.

　　B．Computer models.

　　C．DNA planted in animals.

　　D．Tissue from dead animals.

　　4．What usually happens to unsuccessful animal experiments?

　　A．They are not revealed to the public.

　　B．They are made into teaching materials.

　　C．They are collected for future publication.

　　D．They are not removed from the research topic list.

　　.短文改错

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