题目内容
6、More than two ________ years ago, people knew little about the universe.
A． thousands B． thousand C． thousand of D． thousands of
试题答案
6、B
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More than two _______years ago, people knew little about the universe.
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More than two ________ years ago, people knew little about the universe.
A． thousands B． thousand C． thousand of D． thousands of
查看习题详情和答案>>