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    In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.

    A. signal        B. chance          C. mark            D. measure

    A.


    解析:

    考查名词。根据句意可知打铃及老师合上书本，这是下课的暗示，选项中只能选择signal。chance“机会”，mark“分数，痕迹”，measure“方法，措施”。

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    科目：高中英语 来源：河北省邢台一中2011－2012学年高二下学期第四次月考英语试题 题型：053

    根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为选项．

    Ea sy Way s to Keep Your Brain Sharp

    　　Everyone i s forgetful, but a s we age, we start to feel like our brain s are slowing down a bit-and that can be a very annoying thing．　　1　　 Read on for some technique s worth trying．

    　　1．　　2　　

    　　People who regularly made plan s and looked forward to upcoming event s had a 50 percent reduced chance of Alzheimer' s di sea se(老年性痴呆症)， according to a recent study．　　3　　 Something a s simple a s setting a goal to have a weekly coffee date with a friend will do．There' s evidence that people who have a purpo se in life or who are working on long or short-term goal s appear to do better．In other word s, keep your brain looking forward．

    　　2．Go for a walk．

    　　Mildly rai sed glucose(葡萄糖)level s can harm the area of the brain that help s you form memorie s and phy sical activity can help get blood glucose down to normal level s．In fact, exerci se produce s chemical s that are good for your brain．　　4　　

    　　3．Learn something new．

    　　Take a Spani sh cla s s online, join a drawing club, or learn to play card s．A study found that mental stimulation limit s the weakening effect s of aging on memory and the mind．But the be st thing for your brain i s when you learn something new and are phy sically active at the same time．　　5　　 Or you can ju st go dancing with your friend s．

    A．Focu s on the future．

    B．Thi s can be e specially harmful to the aged．

    C．It should be something like learning gardening．

    D．So take a few minute s each day to do some reading．

    E．But don't worry if our schedule i sn't filled with life－changing event s．

    F．Luckily, re search show s there i s a lot you can do to avoid tho se moment s．

    G．In other word s, when you take care of your body, you take care of your brain．

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