1, the first is to apply with high school average+IELTS/TOEFL. Some countries can apply for studying abroad after the second year of high school, so you only need to provide your average score+language in high school, while some countries can apply after the third year of high school, in addition to your average score+language, you also need SAT.
2, the second is to use A-LEVEL/AP/IB and other grades+IELTS/TOEFL. ALEVEL is an advanced course in the British General Certificate of Secondary Education Examination. Universities with particularly high rankings in Britain usually don't accept students without A-LEVEL grades. AP is a prerequisite course for American universities. After completing the course, you can take the AP exam and get college credits after you have achieved certain results.
3. The third is to pass the domestic college entrance examination score+IELTS/TOEFL. Applying for universities, although this method can't directly choose all British universities, it can save one year's time and expenses. Of course, it is more difficult to apply for the college entrance examination results. For example, Cambridge requires the total score of the college entrance examination to be 0. 1%, and ordinary schools will have some other specific requirements.
4. The fourth is the ossd course+IELTS/TOEFL. OSSD is a high school education in Ontario, Canada, and one of the advanced middle school curriculum systems in the world. It is highly recognized worldwide for its high quality and strict teaching management, and is recognized by all universities in Canada, the United States, Britain, Australia and so on. Entering a world university is a universal qualification.