应该选b
thousand 是个数量词 不用加s
thousands of years 是上千年的,没有确指.
more thsn two ___years ago,people knew little about the universe
more thsn two ___years ago,people knew little about the universe
A thousands B thousand
C thousand of D thousands of
哪一个是正确答案 为什么?
A thousands B thousand
C thousand of D thousands of
哪一个是正确答案 为什么?
英语人气：668 ℃时间：2019-10-17 06:07:28
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