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  3. Advancing age means losing your hair, your waistline and your memory, right? Dana Denis is just 40 years old, but【C1】______ she’

Advancing age means losing your hair, your waistline and your memory, right? Dana Denis is just 40 years old, but【C1】______ she’

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问题     Advancing age means losing your hair, your waistline and your memory, right? Dana Denis is just 40 years old, but【C1】______ she’s worried about what she calls "my rolling mental blackouts. " "I try to remember something and I just blank out," she says.
    You may【C2】______ about these lapses, calling them " senior moments " or blaming " early Alzheimer’s (老年痴呆症) ". Is it an inescapable fact that the older you get, the【C3】______ you remember? Well, sort of. But as time goes by, we tend to blame age【C4】______ problems that are not necessarily age-related.
    "When a teenager can’t find her keys, she thinks it’s because she’s distracted or disorganized," says Paul Gold. "A 70-year-old blames her【C5】______ " In fact, the 70-year-old may have been【C6】______ things for decades.
    In healthy people, memory doesn’t worsen as【C7】______ as many of us think. "As we【C8】______ , the memory mechanism isn’t【C9】______ ," says psychologist Fergus Craik. "It’s just inefficient."
    The brain’s processing【C10】______ slows down over the years, though no one knows exactly【C11】______ Recent research suggests that nerve cells lose efficiency and【C12】______ there’s less activity in the brain. But, cautions Barry Gordon, "It’s not clear that less activity is【C13】______ A beginning athlete is winded (气喘吁吁) more easily than a【C14】______ athlete. In the same way,【C15】______ the brain gets more skilled at a task, it expends less energy on it. "
    There are【C16】______ you can take to compensate for normal slippage in your memory gears, though it【C17】______ effort. Margaret Sewell says: "We’re a quick-fix culture, but you have to【C18】______ to keep your brain【C19】______ shape. It’s like having a good body. You can’t go to the gym once a year【C20】______ expect to stay in top form."
【C13】
选项 A、irregular
B、better
C、normal
D、worse
答案D
解析 上下文推理。上文提到，研究结果表明：神经细胞效率丢失会导致大脑活动减少。转折连词but和动词cautions表明Barry Gordon并不同意这种说法，所以本句的意思应该是“尚不清楚活动较少是否会更糟”，D项为正确答案。A项irregular(不规则的)，B项better(更好的)，C项normal(正常的)，均不合题意。
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