How will my client complete a resource I’ve sent them?
For a given resource to show up on your awaiting review queue and their PAST tab, your client will need to start a task and then finish it (see the various possible interactions listed above), even if the task is text-only and has no interactive elements.
If the resource has interactive elements, clicking “Start” will allow your client to write in the text input fields or select checkboxes or radio buttons where applicable. The answers will be saved when your client clicks “Save” or “Finish”, and both of you will be able to see them online (in your case, only if your client has clicked “Finish” and the task is awaiting review).