2. 外语
  3. If you had to guess the organ that has undue influence on your emotions, your mood, even your choices, what would you guess? The

If you had to guess the organ that has undue influence on your emotions, your mood, even your choices, what would you guess? The

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问题    If you had to guess the organ that has undue influence on your emotions, your mood, even your choices, what would you guess? The brain? Sure, but what else? The heart—that【C1】______seat of the soul? Not quite. The stomach? You’re getting warmer. Would you believe it’s the large and small intestine(肠),【C2】______known as the gut? More specifically, it’s the trillions of bacteria—the microbiota(微生物群)—that live in your gut. Each of us【C3】______up to four and a half pounds of bacteria around in our guts at any given time.
   More than 100 trillion microbes live down there. That’s as many cells as make up the rest of your body.
   Now, this crowd is mostly good guys, and they do important work, to the extent that some scientists【C4】______classifying these collective microbiota as its own【C5】______. Aside from helping digest our food, they protect us from disease, neutralize some of the toxic by-products of the【C6】______process, and make it harder for bad bacteria to set up shop. In short, your gut does way more than just digest everything from Cheetos to Camembert.
   But it turns out gut bacteria may also【C7】______how we feel. Who knew the next【C8】______in mental well-being would lead right to the toilet? With that lovely【C9】______in mind, we know here are various ways our microbiota are【C10】______to our mental health.
A)advocate
B)affect
C)attached
D)carries
E)collectively
F)connected
G)digestive
H)frontier
I)gathers
J)image
K)irreplaceable
L)mythical
M)notoriously
N)organ
O)result
【C2】
选项
答案E
解析 空格位于过去分词known引出的独立结构之中，用于修饰known，故应填入副词作状语。空格前列举了大肠和小肠，并说它们______称为gut，故空格处应填入E)collectively“共同地，集体地”。
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