Open World C1 Unit 6 Grammar Modals in the past

Right or wrong? Correct if necessary. I was locked out of my house but luckily I could climb in trhough an open window.

Right or wrong? Correct if necessary. She didn't need have bought tickets for the show as I had already got some.

Right or wrong? Correct if necessary. You mustn't have gone to the supermarket this morning because I did the shopping yesterday.

Right or wrong? Correct if necessary. You should speak to the cabin crew if you had wanted to chage seats

Right or wrong? Correct if necessary. Because our opponents' defensive play was so skilful, we didn't manage to score even one goal.

Right or wrong? Correct if necessary. I would work for a steel company, but I changed jobs last year.

Right or wrong? Correct if necessary. When they were children, they would often have sleepovers with their friends.

Right or wrong? Correct if necessary. He had been waiting for hours for the foodbank to open. he must been starving.