问题描述：
求解一道英语选择题的解析过程
Some teaching equipment,together with books and pens,----offered to the destroyed schools after the flood.
A.was B.are C.were D.had been offered
Some teaching equipment不是复数吗，为什么要选A而不选C呢？
Some teaching equipment,together with books and pens,----offered to the destroyed schools after the flood.
A.was B.are C.were D.had been offered
Some teaching equipment不是复数吗，为什么要选A而不选C呢？
问题解答：
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