这些乡村小商店起到了非常有用 的作用。

These small village shops ___serve ___a very useful ___purpose.

他们在肯顿小姐的客厅引入了会议，这些会议每晚举行，旨在讨论家务管理。

They introduced meetings at Miss Kenton's parlour which were held every evening and ___served ___the ___purpose of discussing house running.

这个旧工具在我的车间里仍然有用处。

This old tool still ___serves ___a ___purpose in my workshop.