不同学校有自己免托福的规定,比如 “if your native language is not English you must take a test for English proficiency, unless your university degree is from an institution where the curriculum was also taught exclusively in English. ”
Your T can be waived, if you have obtained a degree from an accredited insititute in which english is the primary language.
It really depends. Some schools require TOEFL for students who have already obtained a degree in a English speaking country. Some others would require TSE seperately (old CBT or PBT) although they give waiver to TOEFL.