Whooo's Reading comes with a large database of practice questions that your students can answer in Journal Activities. However, if you want to assign custom questions to your students, you can do that too.
Click your name in the upper right corner and then click Class Settings. Click Questions on the left.
Type your custom question in the box. Select the correct skill set and text type, and then click Save.
You can choose to have your students see only your custom questions when they do Answer a Question Journal Activities for a text that is within the parameters you set for the questions you added. To do that, click the checkbox at the bottom:
When the text students enter match the parameters you set, your questions will display. When the text is outside of those parameters, they will see the default WR Questions.