One of the requirements for the fire is that the material ________ to its burning temperature.A.is heated B.will be heated C.would be heater D.be heated

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One of the requirements for the fire is that the material ________ to its burning temperature.A.is heated B.will be heated C.would be heater D.be heated
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One of the requirements for the fire is that the material ________ to its burning temperature.A.is heated B.will be heated C.would be heater D.be heated
One of the requirements for the fire is that the material ________ to its burning temperature.
A.is heated B.will be heated
C.would be heater D.be heated

One of the requirements for the fire is that the material ________ to its burning temperature.A.is heated B.will be heated C.would be heater D.be heated
D,be+动词过去式,表示被动.只有这个符合标准

这里是假设,应该选C would be heated

选D 省略should

A被加热到它的着火点