You've listed languages that separate statements from expressions in their syntax. There is a whole other family of languages where choose consists entirely of expressions - starting with LISP in the 50s, and including virtually all FP languages today (F#, Ocaml, Haskell, SML, Clojure). Ruby happens to be one a member of the latter group. To be fair, most of the languages in that group don't have an equivalent of return/break/continue either - I think only Ruby and some Lisps do.

Regardless, all of the languages above except C and maybe Object Pascal can still have control stop in the middle of an expression, since an expression can throw an Exception (indirectly). Returning is not significantly different from that.