In these exercises, final and consecutive sentences are mixed. When the sentence is negative, remember that a negative final (purpose) sentence always begins with ne and a consectuive (consequence) sentence never does.
"that no one": use ne quis in a final, ut nemo in a consecutive sentence.
"that no ...": use ne ullus in a final, ut nullius in a consecutive sentence.
"that never" : use ne unquam in a final, ut nunquam in a consecutive sentence.