One of the requirements for a fire is that the material ______ t
分类: 英语（专升本）(z0009)发布时间: 2024-09-16 17:55浏览量: 1
One of the requirements for a fire is that the material ______ to its burning temperature. A、were heated B、must be heated C、is heated D、be heated 【正确答案】：D 【题目解析】：requirement引导的从句要用should/would+动词原形。