Замените в следующих предложениях модальные глаголы их эквивалентами 1. The doctor s

1. 1. The doctor says that you (are allowed to )walk. 2. The vitamins are substances which (have to ) found in the diets of animals in order that they can utilize the organic foodstuffs to best advantage. 3. When the appetite is impaired and nausea and vomiting are common, meals (have to be )small and be given at frequent intervals. 4. With the disappearance of symptoms the patient with infective hepatitis (is permitted to )leave his bed for purposes of toilet.