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  3. What do dieting and energy policy have in common? The SnackWell effect. The name comes from those tasty little cookies that are【

What do dieting and energy policy have in common? The SnackWell effect. The name comes from those tasty little cookies that are【

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问题     What do dieting and energy policy have in common? The SnackWell effect. The name comes from those tasty little cookies that are【C1】_____as being lower in fat and sugar. But they often lead dieters to eat more of them than【C2】_____cookies and then wonder why they’re not losing weight.
    It turns out there’s a SnackWell effect for energy use too—and it may make it tougher for us to cut back on carbon. When【C3】_____conscious consumers buy an energy-efficient dishwasher, for example, they may feel less guilty about【C4】_____the machine more often and as a result may not end up saving much on their utility bills. Likewise, studies indicate that people who 【C5】_____more-energy-efficient lights lose 5% to 12% of the expected savings by leaving them on longer.
    Much like dieters eating too many SnackWell’s, we can fail in our attempts to save energy and money. So resist the【C6】_____to raise your thermostat(恒温器)after you buy a more efficient furnace; lower the temperature by a degree and shave another 1% off your heating bill.
    But even if we do what Jimmy Carter did and wear a 70s-style sweater all winter, we may end up spending those energy savings somewhere else—like on a plane【C7】_____to Bermuda. A report estimated that【C8】_____, this effect could reduce the savings from energy efficiency by 10% or more.
    That doesn’t mean energy-efficiency measures are【C9】_____—or that we should never go on vacation. But it does mean that cutting back on energy【C10】_____, like dieting, is not an excuse to stuff ourselves on less guilty pleasures.
A)ride B)urge C)saving D)special
E)regular F)advertised G)install H)environmentally
I)globally J)route K)acting L)running
M)consumption N)operated O)useless
【C9】
选项
答案O
解析 此处需填入形容词。从doesn’t mean可知此处并非像上文一样一味否定节能措施的作用，useless跟doesn’t一起为双重否定，表肯定，选useless。
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