Question

(   ) 10. Finally,after five years of hard work,he finished his book,which was written      careful observations and detailed studies.

A. on the ground of    B. on behalf of C. on average of    D. on the basis of

Answer 1

10. D考查介词词组的用法。on the ground of 以……为理由；on behalf of为了……的利益，代 表;on average of平均;on the basis of根据，按照  句意：最后，在多年的努力之后，他完成了这本书，这是在仔细观察和详细研究的基础上写成的。