正确答案: A

Coal heats up on its Own and catches fire and burns．   

题目：According to the third paragraph，what will happen when the underground heat does not dis—appear?

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学习资料的答案和解析：

[单选题]She can speak French and German，let alone English.

to say nothing of

解析：A 句意：她会说法语和德语，更不用说英语了。本题考察的是固定词组用法，to say nothing of，更不用说，没有B、C、D这三种说法。