题目

题型：不详难度：来源：

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

答案

C

解析

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。