The most important thing is that you are not skilled, so you should practice more. If there is enough time, many questions will be done by all of us, but the exam must be time-limited. As a result, many people couldn't do it in the exam. When they feel sorry in the examination room, they think there is not enough time. The root cause is unfamiliarity. The same is true of playing chess. People with good skills play cards according to the routine without thinking. Unskilled people have to think every step, which takes too much time. Usually time is still not enough!