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  3. Forty-three percent of Americans say they are too tired to function. So, some mornings, you might even【C1】________staying in bed

Forty-three percent of Americans say they are too tired to function. So, some mornings, you might even【C1】________staying in bed

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问题     Forty-three percent of Americans say they are too tired to function. So, some mornings, you might even【C1】________staying in bed forever. Hey, look, your wish【C2】________! You’ve got everything you need in bed and don’t have to move again. But it won’t be long before you realize that you’ve made a big【C3】________.
    People spend【C4】________Sundays or sick days in bed all the time and are no worse for wear, but if you don’t start moving again after 24 hours, one of the first things to change is your lungs. Gravity isn’t pulling them down into their normal position anymore, so the lower part of your lungs will【C5】________up. You probably won’t feel any different, but watch out, because it’s harder for mucus to pass【C6】________those collapsed passages. So it can get trapped, which can【C7】________ your lungs and ultimately lead to pneumonia.
    Normally, your bones and muscles help【C8】________your weight under gravity. But now that you’re lying down, they’re out of a(n)【C9】________. And as the saying【10】________. if you don’t use them, you lose them. For every week in bed, you lose about 1% of your bone density, making your bones more brittle and easy to【11】________. That’s why astronauts, who often go for months without gravity, exercise for at least 2 hours a day and【12】________calcium. In that same week, you also lose 1% of your muscle mass, 【13】________in your thighs, butt and shoulders, which you’re no longer using.
    【14】________, your brain isn’t a happy camper either. After all, you’ve been【15】________in the same room for months, staring at the same walls, the same spot on the ceiling, having the same experiences day after day. Not great for mental health, to say the【16】________. A study of pregnant women found that bed rest increased their【17】________of anxiety and depression, and some women reported feeling【C18】________ . out of control and imprisoned.
    So, a year of【19】________bed rest is not the relaxing paradise we’d all dream it’d be. Just keep in mind: There’s nothing wrong with a lazy Sunday morning, 【20】________you’re up and moving before Monday strikes.
【C7】
选项 A、destroy
B、activate
C、infect
D、expand
答案 C
解析 本题考查动词词义及上下文逻辑。本句承接上句，说明了黏液难以通过那些萎缩的通道所产生的后果：黏液无法通行，会使你的肺部________，并最终导致肺炎，get trapped以及pneumonia都表明是肺部发生了不良反应，四个选项中，符合此语境的只有选项[C]infect，即因感染而转为炎症，故为答案。
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