17．A.concern

　　B．arrange

　　C．adore

　　D．desire

　　解析　由下一段的“If you desire more from__19__”可知选D项。

　　答案　D

　　18．A.prepare

　　B．enjoy C．imagine

　　D．conduct

　　解析　根据文章题目“Preparing for Tomorrow”及文章主旨可知此处选prepare。

　　答案　A

　　19．A.history

　　B．nature

　　C．life

　　D．marriage

　　解析　由第五段第一句“...with my life...”可知选C项。

　　答案　C

　　20．A.suffer

　　B．experience

　　C．struggle

　　D．work

　　解析　由此句句意“因为你只能经历你准备经历的。”可知B项正确。

　　答案　B

　　Ⅲ.阅读理解

　　In an ideal world，people would not test medicines on animals.Such experiments are stressful and sometimes painful for animals，and expensive and time­consuming for people.Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge.That is why there are some 50 to 100 million animals used in research around the world each year.

　　Europe，on the whole，has the world’s most restrictive laws on animal experiments.Even so，its scientists use some 12 million animals a year，most of them mice and rats，for medical research.Official statistics show that just 1.1 million animals are used in research in America each year.But that is misleading.The American authorities do not think mice and rats are worth counting and，as these are the most common laboratory animals，the true figure is much higher.Japan and China have even less comprehensive data than America.

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