The book was written ______ careful observations and detailed studies.A．on behalf of B．regardless of

题目简介

The book was written ______ careful observations and detailed studies.

A．on behalf of

B．regardless of

C．on the basis of

D．in relation of

题型：单选题难度：偏易来源：不详

试题分析：A. on behalf of代表，B. regardless of不管，不顾，C. on the basis of在…基础上，D. in relation of关于，句意：这本书是在仔细的观察和详细的研究的基础上写的。根据句意选C。