Maybe the speed of doing the questions is not fast enough, so we should strictly observe the time at ordinary times. It may take a long time to do a problem at ordinary times, so we do it better, so we should improve the speed of doing it. As long as you take the time to practice, your ability is there, and you can certainly do it. Don't panic during the exam. Don't worry about how many questions you haven't done yet. The most important thing in the college entrance examination is to do your own questions correctly.