◎ 题干
The machine has been used much too long.  ________it doesn't work well sometimes.  
[     ]
A. It's no wonder that
B. There's no doubt if
C. It's unlikely
D. That's because
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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 machine has been used much too long.________it doesn't work well sometimes.[ ]A. It's no wonder thatB. There's no doubt ifC. It's unlikelyD. That'…”主要考查了你对  【主语从句】  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。