The test questions are difficult to optimize. The optimization of test questions is more difficult than the ninth grade mathematics in the classroom of 1+ 1. The test questions are classic and the difficulty is suitable for the upper-middle level, especially for science subjects, which are quite representative. The answer is also very detailed. In-class 1+ 1 Grade 9 has moderate mathematics difficulty and simple questions. There is no difficulty challenge, and it is suitable for review training in the primary stage.