To achieve a successful English language score in the junior high school entrance exam, you can follow these steps:

1. **Review Basics**: Start with the basics - grammar, vocabulary, and pronunciation. Review the key points of each unit from your textbooks.

3. **Improve Listening Skills**: Listen to English audio materials such as podcasts, songs, or movies with subtitles to enhance your listening comprehension.

4. **Enhance Writing Skills**: Practice writing different types of compositions, such as narratives, descriptions, and arguments. Pay attention to proper sentence structure and spelling.

6. **Solve Previous Exam Questions**: Go through past exam papers and solve the questions under timed conditions. This will help you understand the test format and familiarize yourself with common question types.

7. **Create a Study Plan**: Create a study plan that includes daily learning goals and allocate time for all four language skills (listening, speaking, reading, and writing).

8. **Stay Motivated**: Keep a positive attitude and believe in your ability to improve. Set short-term and long-term goals, and reward yourself for your progress.