After two years' research we now have a better understanding of the disease.(·全国Ⅱ)A.

问题补充：

After two years research，we now have a better understanding of the disease.(·全国Ⅱ)

A. very

B. far

C. fairly

D. quite

答案：

A. very

(答案→)B. far

C. fairly

D. quite

解析：从句中的信息词better可看出是考查比较级前的修饰语。为了突出强调或表示程度，比较级前可用much，far，a little，any，some，a bit，even，still，rather，a lot等词修饰；最高级前可被序数词及much，by far，nearly，almost等词修饰。注意A.very，C.fairly，D.quite不修饰比较级。

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