Theory is based on practice and _____ turn serves practice.(A) on (B) in (C) by (D) at并请说明原因,

问题描述:

Theory is based on practice and _____ turn serves practice.
(A) on (B) in (C) by (D) at
并请说明原因,

B 依赖于实践,反过来服务于实践

选B
真理是建立在实际行动上的,并且反过来服务于时间.
in turn 反过来 的意思.是固定搭配.