2. 外语
  3. Anthropologists agree that our primitive ancestors who inhabited the tropics probably have natural protection against the sun.

Anthropologists agree that our primitive ancestors who inhabited the tropics probably have natural protection against the sun.

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问题 Anthropologists agree that our primitive ancestors who inhabited the tropics probably have natural protection against the sun.
选项
答案have—had
解析 译文：人类学家赞同：生活在热带地区的远古祖先可能天生具有抵御阳光的保护力。
分析：考查时态。that从句的主语是our primitive ancestors(我们远古的祖先)，其谓语动词只能用过去时态，不能用现在时。此处have应改为had。
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