Написать следующие предложения в present indefinite: 1. the assistant carried out numerous experiments. 2.the students attended classes in different subjects. 3.the doctor listened to the heart. 4. professor sobolev delivered his lectures on fridays.

1. The assistant carries out numerous experiments. 2.The students attend classes in different subjects. 3.The doctor listens to the heart. 4. Professor Sobolev delivers his lectures on Fridays.