According to the passage, 80% of all human illnesses are connected with ______. Sometimes the reason that drugs like penicillin

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问题 According to the passage, 80% of all human illnesses are connected with ______.
Sometimes the reason that drugs like penicillin are given to animals is to ______.

选项 A、cure the iii animals
B、make animals healthier
C、help animals to grow
D、fatten animals

答案D

解析 细节题。答案在文章的倒数第二句。
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