classes: lecturer. Only give to do short and medium exercises, in the process of doing exercises, help students who do not understand the lesson, do not leave out. curriculum. Only give to do short and medium exercises, in the process of doing exercises, help students who do not understand the lesson, do not leave out. facility. Only give to do short and medium exercises, in the process of doing exercises, help students who do not understand the lesson, do not leave out. general. Only give to do short and medium exercises, in the process of doing exercises, help students who do not understand the lesson, do not leave out.