单选题：Without the sun’s light ____the earth’s surface, no life cou

题目分类：英语运用能力测试
题目类型：单选题
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题目内容：

Without the sun’s light ____the earth’s surface, no life could exist on the earth.（　　） A．warms
B．warmed
C．warming
D．to warm

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答案解析：

根据以上材料和以下选项回答问题：

根据以上材料和以下选项回答问题：

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