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

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问题 One of the requirements for a fire is that the material _______ to its burning temperature.

选项 A、is heated
B、will be heated
C、be heated
D、would be heated

答案C

解析 在与motion,order,plan,recommendation,proposal,idea,request,requirement,suggestion等名词相关的从句中,谓语要使用动词原形或“should+动词原形”。
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