Here is a Cultural Literacy worksheet on the idiom vicious circle. This is a half-page worksheet with a reading of one longish compound containing a colon and a semicolon which might, obviously, be best revised for emergent readers and those working to acquire English as a new language. There is one simple comprehension question and one imperative to use vicious circle in a sentence.
In other words, a basic introduction to this very commonly used idiom in English.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.
Mark's Text Terminal 