So far, large quantities of information ...

So far, large quantities of information _____ sent to the company by email, which has a great effect on improving the quality of its products.

A. has been B. have been

C. was D. were

B 【解析】试题分析：句意：迄今为止，大量的信息通过邮件发送到这个公司，这对提升公司产品质量有很大的影响。large quantities of后面无论加可数名词复数形式还是不可数名词谓语动词都用复数形式。排除A、C。so far 是现在完成时的标志，故选B。考点：考查主谓一致

考点分析：

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