Here's why:
* "Hold" needs a helping verb: The verb "hold" requires a helping verb like "be" or "will" to be used in the passive voice.
* Passive voice structure: The correct passive voice structure would be "are going to be held."
Here are some examples of how to use "hold" correctly:
* Active voice: They are going to hold the meeting tomorrow.
* Passive voice: The meeting is going to be held tomorrow.