根據(jù)下面內(nèi)容，回答題：

　　In June of 1973, nine whales beached on the Florida coast. Beaching means swimming out of theocean onto the beach, and usually dying there. No one knows why they do it, but a number of whalesbeach themselves every year. Some people think beaching is an accident.

　　Perhaps the whales get confused. Scientists who studied the beaching of three dozen whales inAustralia think the whales may have been confused by loud noises. Whales can tell where they are bysounds. They send out sounds and listen as they travel past or bounce off objects. Two days beforethese thirty-six whales beached, loud guns had been fired for two hours. The loud sounds may haveconfused the whales. Their confusion might have caused them to wander into low water.

　　Whatever the reason whales beach, it is a sad event. People try to save them, but very fewbeached whales live. One whale that was rescued from beaching in Florida lived for forty-five days.That is the longest a beached whale has ever survived. And it lived that long only" because it got at-tention from doctors.

　　All over the world, scientists rush to whale beachings as soon as they hear about them. They hope to learn why whales beach, and how to save them.

　　52The subject of this passage is__________.

　　A.the Florida BeachesB.Beached WhalesC.Whale SoundsD.Medical Treatment of Whales

　　參考答案：B

　　參考解析：

　　全文講鯨魚擱淺的事。B項是正確的。其他選項都很片面，文章中雖然提到，但不是主題。

　　53One reason whales beach may be

　　A.because they are hungryB.because they are attackedC.that people can study themD.that they are confused

　　參考答案：D

　　參考解析：

　　第二段科學家認為鯨魚是被什么困惑誤游到低水位的沙灘。D項是正確的。

　　54Whale beachings are sad events because

　　A.people know the whales are going to dieB.the whales have to be carted away and buried .~..C.the whales cannot be used as foodD.no one can use the beach on those days

　　參考答案：A

　　參考解析：

　　第三段中提到一旦鯨魚擱淺，等待它的只有死亡。A項是正確的。B項可能是事實，但文中并未提及鯨魚死后的處理。

　　55To make the point that beached whales do not survive, the author uses

　　A.the opinions of famous peopleB.a vivid word pictureC.an exampleD.a firsthand story參考答案：C

　　參考解析：

　　第三段中提到作者以佛羅里達州一條擱淺的鯨魚為例，證明鯨魚一旦擱淺就注定死亡。C項是正確的。

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