Is the notebook and dictionaries still on the bottom shelf where I left them?

Which sentence corrects the error in subject-verb agreement?

Is the notebook and dictionaries still on the bottom shelf where I usually leave them?
Is the notebook and dictionaries still on the bottom shelf where I usually leaves them?
Are the notebook and dictionaries still on the bottom shelf where I usually leaves them?
Are the notebook and dictionaries still on the bottom shelf where I usually leave them?