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  3. California State Law requires that all bicycle riders under age 18 wear protective helmets whenever they ride on public streets

California State Law requires that all bicycle riders under age 18 wear protective helmets whenever they ride on public streets

admin2010-07-24  48
问题     California State Law requires that all bicycle riders under age 18 wear protective helmets whenever they ride on public streets or trails．Medical research shows that 85% of【B1】______brain injuries can be【B2】______by wearing a bicycle helmet．About 1000 bicycle riders are killed in the U.S.every year，usually in【B3】______with cars，and 75% of them die of head injuries．Many thousands more suffer less severe but still debilitating injuries which are【B4】______than simple road rash and broken bones．Children can suffer permanent personality changes and learning【B5】______from a brain injury．Common long term【B6】______includes concentration difficulties，aggressiveness，headaches and balance problems．【B7】______your great pain if this happens and you have to blame it on your【B8】______to buy a helmet!
    There are many good helmets off the market．You can make your choice based on three criteria：【B9】______．
    A helmet that doesn’t fit，doesn’t sit correctly on your child’s head，not only looks silly but is less than useless．A good reason to purchase the helmet from a bike store is the fact that【B10】______．You shouldn’t expect the sales to help at a discount or department store to correctly perform the service．Some helmets look better than others．【B11】______．
【B4】
选项
答案worse
解析 空前的系动词be和空后的than提示此处所填词应为形容词的比较级。前半句的less severe虽然降低了injuries的严重程度，但less…but still…这种结构仍然肯定了问题的严重；than后面的simple一词又降低了后面的road rash and broken bones的严重程度。由此推测，此处要表达的意思应该是对车祸中幸存下来的骑车者来说，还有比road rash and broken bones更严重的伤势，更糟糕的情况。worse为比较级，意为“更糟糕的”。
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