It’s our guilty pleasure: Watching TV is the most common everyday activity, after work and sleep, in many parts of the world. Am

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问题     It’s our guilty pleasure: Watching TV is the most common everyday activity, after work and sleep, in many parts of the world. Americans view five hours of TV each day, and while we know that spending so much time sitting【C1】______can lead to obesity(肥胖症)and other diseases, researchers have now quantified just how【C2】______being a couch potato can be.
    In an analysis of data from eight large【C3】______published studies, a Harvard-led group reported in the that for every two hours per day spent channel【C4】______, the risk of developing Type 2 diabetes Journal of the American Medical Association(糖尿病)rose 20% over 8. 5 years, the risk of heart disease increased 15% over a【C5】______, and the odds of dying prematurely【C6】______13% during a seven-year follow-up. All of these【C7】______are linked to a lack of physical exercise. But compared with other sedentary(久坐的)activities, like knitting, viewing TV may be especially【C8】______at promoting unhealthy habits. For one, the sheer number of hours we pass watching TV dwarfs the time we spend on anything else. And other studies have found that watching ads for beer and popcorn may make you more likely to【C9】______them.
    Even so, the authors admit that they didn’t compare different sedentary activities to【C10】______whether TV watching was linked to a greater risk of diabetes, heart disease or early death compared with, say, reading.
A)climbed I)previously
B)consume J)resume
C)decade K)suffered
D)determine L)surfing
E)effective M)term
F)harmful N)terminals
G)outcomes O)twisting
H)passively
【C2】

选项

答案F

解析 形容词辨析题。在how引导的宾语从句中,being a couch potato是主语,can be是谓语,how______是表语,而how是关系副词,因此本空应填入形容词。由上文可知,看电视会导致肥胖症和其他疾病,a couch potato指“长时间坐在沙发上看电视的人”,由此可推断,本句是在说长时间看电视的坏处,因此答案是F)harmful。解答本题的关键在于理解a couch potato的意思。此外,备选形容词中effective意为“有效的”,与文意不符,因此排除。
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