It looks to me like at least some of the wrong responses in a cloze test should come from the same lesson as the correct response. Otherwise, one only has to look for the familiar term in the list of five responses to find the correct answer.
@donhamiltontx - This makes sense when studying directly from a lesson, but most cloze tests are done through the LingQs of the Day email, which contains a random list. That being said, this is something we may look at in the future should we refine the cloze test further!
Understood. Thanks, Alex.