问题
选择题
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．do heat
答案
答案：B
前面有requirements此处的表语从句用虚拟语气。
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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．do heat
答案：B
前面有requirements此处的表语从句用虚拟语气。