To get some idea of whether La Brana Ⅰ's coloring was unusual for his day, the researchers will try to sequence the DNA of his companion, who has been named La Brana Ⅱ.

　　本文是一篇科普文，向读者介绍分析了一项科学发现，蓝眼的人一直在欧洲生活了7000多年，并从DNA排列，以及其他的考查中分析造成眼睛及肤色变化的原因。

　　5．Why are scientists interested in La Brana ？

　　A．They can know Europeans' DNA.

　　B．They can know the ancient agriculture in Europe.

　　C．They can know European hunter­gatherers' DNA.

　　D．They can know some of their predictions were correct.

　　答案：C　细节理解题。根据第三段“...because he offers a snapshot of what was in Europeans' DNA before agriculture spread through the continent.”可知。

　　6．La Brana

　　remains as it was due to________.

　　A．dry weather

　　B．a cold condition

　　C．proper protection

　　D．a high cave

　　答案：B　细节理解题。根据第四段“and the cave provided a cold, refrigerator－like environment that preserved his DNA”可知。

　　7．Which of the following is TRUE?

　　A．La Brana Ⅰ's gene variants spread together.

　　B．La Brana 's DNA influences his appearance.

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