After two years' careful study, we now have a better understanding of the cause

 After two years' careful study, we now have a ______ better understanding of the cause of the

problem.

A. very          B. much                            C. fairly           D. quite

试题答案

B经过两年的仔细研究之后，我们对这类问题的起因已经有了更好的了解。much 用于修饰比较级better。