More than two _______ years ago, people knew little about the universe. [ ]A. thousands B. thousand

题目简介

More than two _______ years ago, people knew little about the universe. [ ]A. thousands B. thousand

题目详情

More than two _______ years ago, people knew little about the universe.
[     ]
A. thousands
B. thousand
C. thousand of
D. thousands of
题型:单选题难度:中档来源:同步题

答案

B

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