In the factory the helmets the workers wore varied color according to their different po

问题补充：

In the factory, the helmets the workers wore varied color according to their different posts.

A. from

B. in

C. with

D. alongside

答案：

A. from

(答案→)B. in

C. with

D. alongside

解析：考查介词辨析。In表示“在…方面”句意：在工厂里，工人们戴的帽子根据他们不同的职位而发生变化。故B正确。