then 的作用

then是接下来，然后的意思~

它是个副词，既然是副词当然放在句子的哪里都可以，但是外国的思维是喜欢把它放中间，这点和however等的习惯用法相同。然而我们中国的思维习惯于把它放句首~

所以你可以把这句话看成Then,What did the use of WorkSet colours allow the company to do?

那时, 当时 what did you do then? 你当时在做啥？对过去的提问。
当时的，
当时, 那么, 在那时

Then
"Then" means "at that time," There must be some reference for the specific time. for example:

Please call him and make an appointment. He will meet with you then.(Then means "at the time of the appointment")只要有提及那个时间就可以不用说出来

"Then" has other meanings such as "next", or "after that".

She went to the school to pick up her kids, and then (after that) she did some shopping.

He got 100 in the English test.