A．1.B．2.C．3.D．4.

　　37．Which of the following is true according to the passage?

　　A．The on­the­ground incidents like Chernobyl, effected birth gender across the globe.

　　B．There was an increase in the number of baby boys in many eastern European countries for several years after 1986.

　　C．The Japan's nuclear accident will not effect the birth gender of the U．S. because of the long distance.

　　D．Where radioactive material has spread, women can't give birth to children.

　　38．How does radiation effect birth gender?

　　A．It damages the Y chromosome in sperm.

　　B．It stops X chromosomes and Y chromosomes combining.

　　C．It kills baby girls before they are born.

　　D．It damages the X chromosome in sperm.

　　39．What does the passage mainly tell us?

　　A．Nuclear age has led to millions of fewer baby girls being born.

　　B．Nuclear radiation has bad effects upon people's health.

　　C．Worries about radiation risks.

　　D．Nuclear age helps reduce the world population.

　　Ⅳ.短文填词

　　阅读下面短文，根据以下提示：1)汉语提示，2)首字母提示，3)语境提示，在每个空格内填入一个适当的英语单词，并将该词完整地写在下边相对应的横线上。所填单词要求意义准确，拼写正确。

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