So the foundation is not very good. Make the basic questions stable, and the last question depends on whether the 1 question can be done well. Generally the first question is not difficult. If there is no clue for a certain period of time later, give up checking the previous basic questions to achieve the lowest error rate. If you are excellent, you must lay a good foundation and get about 10 on the last question, so that you can win!
Wish you success!