In the third box you will see if you were right or wrong.
Continue takes you to the next word in the quiz.
When you finish, you can click Continue to redo the quiz with the words you got wrong or click See Errors to get a list.
Use your mouse or [TAB] key to move around. Each time you press the [TAB] key it moves you to the next box or button, but you will have to hit it a few times after Continue to get to the box where you write. However, it's always the same number of times.