How to learn how to draw fast topics by hand? How can I draw a good quick sketch for the exam? Where to learn good

Quick question I was enrolled in a training course specifically for Shanxi University art research, in the North Zhang district there, I was the winter holiday began to learn, March school started in the school on their own drawings, every day to insist on drawing a picture, and sometimes draw two, finish drawing a book. Because for landscape trees and lines are very important, the line of the ring art is equally important, other directions of the students should also be so persistent. Before the summer vacation, you must learn the culture course, because in the summer vacation will start to sprint professional courses, summer vacation is very critical time. I am in the studio every day to grasp very tight, teachers and sisters are particularly attentive to us, afraid that we did not understand, the learning atmosphere is also particularly good. In the studio, whether it is in the professional or cultural courses, there are times when life is confusing, you can ask the teachers and siblings. Studio each stage will invite the tutor to assess the painting, the tutor is very responsible for each person's painting will talk about, really admirable ah. To the pre-test studio and betting class this is the most important, but also the most critical time, must hold on at this time, I saw a lot of people around me in the year half of the middle to give up, since the decision to study for the exams will have to stick to it.