While larger banks can afford to maintain their own data-processing operations,many smaller regional and community banks are finding that the cost associated with upgrading data-processing equipment and with the development and maintaince of new products and technical staff are prohibitive.
A cost associated with
B costs associated with
C costs arising from
D cost of
E costs of
为什么会选B 主语到底是哪个
看OG解释看的晕晕的
谢谢大家哈!!!
好人有好报
本题的后半部分由“that” 引导了一个宾语从句。划线部分包括了把宾从的主语，要确定它是单or复，就要迁就从句的谓语“are”，从而判断主语是复数。将宾从从简就是the costs are prohibitive。
补充一点:associated with .......and with.........
加上三楼的解释,就选B
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