He ll be really disappointed ___ he fails his exams 1) until 2) if 3) after 4) when 5) unless

Question

Английский язык: He ll be really disappointed ___ he fails his exams 1) until 2) if 3) after 4) when 5) unless​

Salvatation1230 · Answer

He ll be really disappointed if he fails his exams-Он будет очень разочарован, если провалит экзамены...

He'll be really disappointed ___ he fails his exams 1) until 2) if 3) after 4) when 5) unless