19.There are three _____ workers in the factory.A.thousands B.thousands of C.thousand选哪个,为什么?

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19.There are three _____ workers in the factory.
A.thousands B.thousands of C.thousand
选哪个,为什么?

选C
thousand前面加数字的时候用单数,如果形容几千个的话,用复数,但是后面要加of,也就是thousands of

C thousand 前有数字则不加“s'

C和hunderd一样表几千用单数three thousand and four hunderd 3400

C
因为十，百，千等这样的词当前面有具体的数量词修饰时后面就不能加s
而thousands of 这个词组前是不能加数词的。
希望可以帮到你~~~

c 数字后的thousand、hundred都不加s；
有of结构时加s，但此时前面不可加数字

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