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Koalas, native to the Australian wilds, initially proved difficult to keep alive in zoos, because koalas eat nothing but the leaves of the eucalyptus tree(桉樹). Zoos provided them ____1.______ an unlimited supply of eucalyptus leaves. One zoo even planted eucalyptus trees _____2.____(make) sure that the koalas had a continual supply of fresh leaves. However, koalas kept in cages always died within a year of their ___3._____(arrive) at the zoo.

Eventually it was discovered that eucalyptus trees less than five years old sometimes produce a kind of acid in their leaves. Taking in small quantities of this acid ___4.____ (be) fatal to the koalas. In their natural habitat, the koalas’ senses tell them ____5.____ eucalyptus trees have dangerous leaves, and they simply move on to other trees until they find leaves _____6.____ are safe to eat. But in zoos, when their keepers unknowingly were giving them leaves with acid, the koalas ____7.____(leave) with only two options: eat the poisonous leaves ____8.___ starve. Either option was fatal to the ____9._____(trap) koalas.

Fortunately, today’s zoos use special tests to distinguish between poisonous eucalyptus leaves and safe ___10.______, and now koalas are eating well and living an easy life in zoos.

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科目：高中英語 來源：2015-2016學(xué)年四川廣元市高一下期第一次段考英語卷（解析版） 題型：書面表達(dá)

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For once, instead of being the way others want you to be, be yourself. Look within and find yourself in you. Think about the things that you would want to do if you didn’t have any family responsibility or any money issue. If you really want to know how to find inner peace, then think, what you would want others to describe you as—an honest person? Or loving, or realistic? 3.

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The teenage years can be tough, and it’s normal to feel sad every now and then. But if these feelings don’t go away or become so intense that you can’t handle them, you may be suffering from depression.1.

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Making healthy lifestyle choices can do wonders for your mood. Ever heard of a "runners high"? Physical activity can be as effective as medications for depression, so get involved in sports, ride your bike, or take a dance class. Any activity helps! 3.As for food, make sure you’re feeding your mind with plenty of fruits, vegetables, and whole grains.

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5.

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科目：高中英語 來源：2015-2016學(xué)年甘肅天水一中高二下第一次月考英語卷（解析版） 題型：閱讀理解

閱讀理解Here is an astonishing and significant fact: Mental work alone can’t make us tired. It sounds absurd. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue(疲勞). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

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