In the app, go to Mobile 34 > Lesson Testing > Backups from users > Lesson 1.
If the user has already started the lesson, click "No" (so you start from the beginning). If the user hasn't started the lesson just click Start.
Check that you can only select one of the two options in the question. Select the one you want and proceed to next page.
Do the same for all questions in the lesson. Make sure to check that you can only select 1 of the answers.