The commission also is trying to determine what caused the deaths of up to 100,000 fish over a 20­mile stretch of the Arkansas River near a dam in Ozark,125 miles west of Beebe.The fish were discovered on December 30.Stephens said the commission expected results on the fish tests in probably a month.Since almost all the fish were one species—bottom­feeding drum，Stephens said，the test was very important.Stephens also said：“The events do not appear related.”Both that section of the river and the air at the site of the bird deaths were tested for toxins (毒素)．Beebe is a town of about 4,500 people located 30 miles northeast of the state capital.

　　[解题导语]　数以千计的红翅黑鹂突然在除夕之夜死亡，从空中纷纷落下。无独有偶，多达十万条鱼在河中离奇死亡。其中的原因是什么？

　　1．What is NOT the probable reason why the dead red­winged blackbirds fell from the sky?

　　A．Internal hemorrhage.

　　B．Fireworks.

　　C．Lightning weather.

　　D．Toxins.

　　解析：细节理解题。第一段倒数第三句提到了A项，第二段第一句提到了B项，第三段第一句提到了C项，文章中提及的毒素是造成鱼死亡的原因，故选D。

　　答案：D

　　2．In the third paragraph，the underlined word “discounted” probably means ________.

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