Using traditional Chinese medical records, Youyou Tu rediscovered an ancient plant-based treatment for malaria that worked ________ modern therapies failed.
---- Will he fail in the exam? ---- ____.
---- Do you think it will snow tomorrow? ---- ____.
---- I won’t do it any more. ---- ____?
---- Won’t you have another try? ---- ____.
So ____ that no fish can live in it.