In this case, you can pat yourself on the back with a job well-done and wait until tomorrow, till you get the new 120 questions the next day.

Or, if you can't wait and want to continue the training, you can purchase the "5000 premium questions" package and get additional questions that only get used after the 120 daily limit is reached.

The 5000 questions get connected to your account and do not expire should your PRO subscription end and get renewed after some period of subscription inactivity.