题文
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 |
推荐试卷
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 |
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