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It was ____ to confuse the two twins with each other.
Fragile means ______ broken.
His bravery was a _____ act.
He stepped down from the position _____.
Pigs cannot ________ fly!
It is ________ for some aeroplanes to fly inverted.
Jack completed the task __________ well.
_______ I should go to bed as it is getting late.
Walking is a _______ form of exercise.