英语四级
填空题a favorite bed, a favorite position, and a 7 you
参考答案：暂无进入在线模考
【解析】选[I]。空前的a表明此处应填一名词，且该名词能与follow搭配使用。此句还是对睡眠规律进行解释说明：你 还会形成一套睡眠规则，故答案为[1]formula(规则)。
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