◎ 题干
The heavy __________ in the sky show that it is going to rain.
[     ]
A. clouds
B. cloud
C. cloudy
D. clouded
◎ 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“The heavy __________ in the sky show that it is going to rain.[ ]A. cloudsB. cloudC. cloudyD. clouded…”主要考查了你对  【可数名词(单数名词,复数名词)】  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。