◎ 题干
What caused the accident _____ on the road.
[     ]
a. were stone
b. were stones
c. was stone
d. was stones
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“What caused the accident _____ on the road. [ ]a. were stoneb. were stones c. was stone d. was stones …”主要考查了你对  【可数名词(单数名词,复数名词)】【主谓一致】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。