Ответ:1the text was read by students when the teacher and in.
2 the food is pushed by peristaltic movements into the upper part of the throat.
3 the function of the heart will be studied by them.
4 the peculiarities of the digestive system were explained by the teacher to the students.
5 a new instrument is introduced by this doctor
6 chemistry will be studied first-year by students
7 the activity of gastric by means of the microscope was demonstrated by the professor
8 many experiments will be made by him
Объяснение: