题目内容
One of the requirements for a fire is that the material _________ to its burning temperature.
A. is heated B. be heated C. would be heated D. shall be heated
【答案】
B
【解析】
试题分析:句意:对火的要求之一是材料要被加热到燃点。主语是requirement,suggestion,order,advice等词后面的表语从句中用虚拟语气:should do,should可以省略,而且material和heat是被动关系,用被动语态,选B。
考点:考查虚拟语气
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