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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 heated        D. be heated

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

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

A. is heated                                               B. will be heated

C. be heated                                              D. would be heated

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. shall be heated

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

   A. is heated                B. will be heated               C. be heated   D. would be heated                                  

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

A. is heated　 B. will be heated　 C. be heated　 D. could be heated