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Which countries are IELTS and TOEFL applicable to respectively?

IELTS: There are nearly 800 universities in Britain, Australia, New Zealand, Canada, other European countries and America (there are nearly 3,000 universities in America). TOEFL: USA, Canada, UK, etc. Basically, the two are universal. However, if I go to America, I suggest taking the TOEFL. Going to other countries, especially Britain and Australia, it is recommended to take IELTS.