Once upon a time there were four little rabbits. Their names were Flopsy, Mopsy, Cotton-tail and Peter. One morning they were allowed to play outside.Their mother reminded them not to go to Mr. McGregor’s garden because their father had an accident there.Flopsy, Mopsy, and Cotton-tail were good little rabbits. They went down the lane to pick blackberries. But Peter was naughty. He ran straight away to Mr. McGregor’s garden. He ate some lettuces, French beans, and radishes. Suddenly, he met Mr. McGregor. Peter was very frightened and rushed away as fast as he could. He lost a pair of shoes and a jacket while he was running. Peter never stopped running or looked behind him till he got home. During the evening, he was sick because he was so tired. He had to drink some medicine while three of his brother had bread, mild and blackberries for supper.

Why did peter got ill ?​