Условие:
Insert articles where necessary:
1. ... first stage of digestion takes place in ... mouth where the salivary enzyme pytalin initiates digestion of carbohydrates.
2. This occurs during ... mastication which mixes food and saliva together.
3. The ball of, food is then swallowed and passes down ... oesophagus into ...stomach.
4. Food is propelled down the oesophagus by ... muscular action called peristalsis.
5. It occurs progressively, along ... entire alimentary canal, and consists of ... alternation waves of muscular contraction and relaxation.
С переводом
Решение:
Давайте вставим артикли в предложениях и переведем их на русский язык. 1. The first stage of digestion takes place in the mouth where the salivary enzyme pytalin initiates digestion of carbohydrates. Первый этап пищеварения происходит в рту, где слюнявый фермент пытилин инициирует переваривание углеводов. 2. This occurs during the mastication which mixes food and saliva together. Это происходит во время жевания, которое смешивает пищу и слюну. 3. The ball of food is then sw...