Употребить модальный глагол 1. I was pushing the door with all might - but it ... open! 2. The painting ... be a masterpiece,

1. I was pushing the door with all might - but it was able to open!2. The painting cannot be a masterpiece, but the colours are wonderful!3. I will be worried, so you couldnot phone me every evening.4. To save money you can take a sandwich to eat on the train.5. We\'re going to this performance! I am able to buy 2 tickets at a very ridiculous price!6. You\'ve broken my cup. You could it!7. It\'s impossible! He could have taken the money!