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One of the requirements for a fire is that the material ____to its burning temperature.

A.be heated
B.is heated
C.would be heated
D.to heated
查看答案
正确答案： A
答案分析： 【句意】形成火的条件之一是该材料能够被加热到燃烧的温度。
【难点】A)项requirement 这个词和idea, suggestion等一样，要求从句里的谓语动词用(should)+动词原形。
包含此试题的试卷：
大学专业八级英语（词汇与语法）全真模拟练习及答案解析
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