【题目】There are many (学说) about the origin of life.
在线课程【答案】theories
【解析】句意：关于生命的起源有许多学说。many后面接可数名词的复数形式，故填theories。
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There are many about the origin of life.
编辑：chaxungu时间：2026-04-27 03:14:17分类：高中英语题库
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