For students attending secondary school in the US
BU requires either the SAT or ACT. BU does not require the optional essay on the SAT test or the optional writing component for the ACT.
For any student attending a secondary school outside of the US and who is enrolled in a full International Baccalaureate (IB) Diploma program
Submission of an SAT or ACT test score is not required to complete your application. While the SAT or ACT is no longer an application requirement, standardized test scores may be submitted with your application if you feel they are reflective of your academic ability. Please note that if you are applying for the Boston University Trustee Scholarship, the SAT or ACT is still required.
http://www.bu.edu/admissions/apply/first-year/
同学你是否为IB国际课程项目呢?如果不是此类情况 需要提交带有Essay的SAT1成绩的说