more thsn two ___years ago,people knew little about the universeA_英语解答

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?

人气：158 ℃　时间：2019-10-17 06:07:28

解答

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.