7 Correct mistakes.
1 I am not busy at the weekends.
2 The student is not responsible for his work at the university.
3 Do medical students study anatomy?
4 In Ukraine there is a wide network of higher medical institutions.
5 The scientists are still doing research in the field of medicine.
6 The equipment of the laboratory is modern and it presents great
facilities for learning chemistry.
7 My everyday activities are quite routine but they still require a lot of
time.
8 The sciences we study are difficult but good knowledge of them is necessary for my future profession.