Choose the word or phrase a) b) c) or d) that

Choose the word or phrase a) b) c) or d) that best complees the sentence or conversation:1. A: Did you buy some new trainers? B: No, I ______. I found my old ones. a) hadn39;t b)should39;t c) mustn39;t d) didn39;t have to2. I wanted to win but there was no way I ______ any faster in the race. a) could have run b)must have run c) would have run d) should have won3. If he39;d trained harder he __________ the gold medal. a) might have won b)should win c) must have run d) should have won4. It39;s very unusual for her to arrive late. She _______ what time it starts. a) should have forgotten b)must have forgotten c) should have forgotten d) can39;t have forgotten