Представленные ниже слова написать во множественном числе на английском языке:
radius, crisis, antenna, appendix, criterion, stimulus, encyclopedia, prognosis, sanatorium, axis, aircraft, medium, matrix, nebula, phasis, optimum, syllabus, supernova, synthesis, spectrum, thesis, equipment, maximum, hypothesis, equilibrium, millennium, oasis, curriculum, phenomenon, analysis, alumna, alumnus, bureau, half, human being, person, atrium, experience, spa, issue, research, «how and why», «do and don't», literatus, tenet.