滤池的工作期可分为（）。

A.清洗期、成熟期、过滤期

B.成熟期、过滤期、清洗期

C.沉淀期、清洗期、过滤期

D.过滤期、清洗期、成熟期

E.成熟期、清洗期、沉淀期

Miss Smith never tired of talking about her new horse, ___ she took pride.

A．which

B．of which

C．in which

D．that