※ 어법상 옳지 않은 것을 고르시오. [문 4～문 7] The immune system in our bodies

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2. depend on how well our immune system works. Biologists used to

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fights the bacteria and viruses which cause diseases. Therefore, whether or not we are likely to get various diseases

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depend on how well our immune system works. Biologists used to

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think that the immune system was a separate, independent part of our body, but recently they

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have found that our brain can affect our immune system. This discovery indicates that there may be a connection between emotional factors and illness.