Hello Andew,

All past work is reviewable at any time! Scroll up on the left side menu in the Practice tab
to locate past tasks and tests. When you find the relevant practice to review, click on it,
and then select the "review" button as shown in the images below. 

Practice task review tab:

Practice tests review button:

Do you believe this addresses the issue? I hope this helps but please let me know if you need any further assistance!