i cannot to change my security questions, i remember my paswords and my gmail. but i cannot to recover questions

See this links and follow the instructions

If you forgot the answers to your Apple ID security questions - Apple Support

Change your Apple ID security questions - Apple Support

If you were syncing with iCloud, have you signed into iCloud using the same Apple ID, and turned Photos syncing on? The photos sync is extremely slow. It could take several days or more for the photos to sync.

If you weren't syncing with iCloud, do you have a backup you can restore from? Restoring from a backup erases all data currently on your device. Any data newer then when the backup was made will be erased. A restore is an all or nothing restore. You can't access a backup to see the contents and only restore certain files.

Backup - Restore your device from an iCloud or iTunes backup.    *

ASC YouTube for how to restore an iPhone, iPad, or iPod touch from an iCloud backup

ASC YouTube for how to restore your iPhone or iPad from a backup on your Mac