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) hadn't b)should't c) mustn't d) didn't have to 2. 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 won 3. if he'd trained harder he the gold medal. a) might have won b)should win c) must have run d) should have won 4. it'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) can't have forgotten