Last year I visited a chemical factory in Baise there are about workers in it.A. six th

问题补充：

Last year, I visited a chemical factory in Baise, there are about workers in it.

A. six thousands

B. six thousand

C. six thousands of

D. six thousand of

答案：

A. six thousands

(答案→)B. six thousand

C. six thousands of

D. six thousand of

解析：本题考查数词的用法，thousand前有基数词时，不能加s，且不与of连用，故选B。