3．Srivastava's opinion is different from that of some other scientists in that ________.

　　A．the long­term effect of the oil spill remains to be seen

　　B．the effect of the oil spill is quite clear and it needs no study

　　C．the hatching of turtles is free from the effect of the oil spill

　　D．the oil spill does lead to a higher mortality rate of the hatchings

　　答案：C　考查细节理解。根据倒数第二段可知， Srivastava认为石油泄漏对于海龟的孵化没有影响，这一点与一些科学家的看法相反。

　　4．The best title for the passage should be “________”.

　　A．The mortality rate of the hatching of turtles

　　B．Oil spill spoils thousands of turtle eggs

　　C．How turtles survive the oil spill

　　D．Effect of oil spill on the environment

　　答案：B　考查主旨大意。浏览全文不难看出本文主要是围绕石油泄漏对海龟孵化的影响来讨论的，因此选项B适合作标题。

　　B

　　Scientists say illegal logging is threatening one of Mexico's most famous insects. Satellite pictures show large wooded areas have been cleared from the central Mexican state of Michoacan. The forests are the winter home for millions of monarch butterflies. The butterflies go there each year to reproduce. After reproducing, the adult butterflies die，but their young return to the home of their parents each spring.

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