Make sure your standard is acceptable to them.SAT is not the
only entry requirement for US colleges.SAT I and SAT II is needed,
and they need to see your high school diploma equivalent.
Okay, i'm taking UC Berkeley as an example.
http://students.berkeley.edu/admissions/freshmen.asp?id=55&navid=N
Applying as a Freshman
To be eligible for admission as a
freshman (first-year student) at UC Berkeley, you must first
complete a university-preparatory secondary school curriculum, and
earn a completion certificate or diploma that leads to admission to
a university in your country. This must be accomplished before the
beginning of the fall semester you would enter UC Berkeley. SAT I
and SAT II tests are required for all freshman applicants (see
Required Tests). The TOEFL or IELTS test is required if English is
not your native language (see TOEFL / IELTS).
Singapore: Three Advanced Level
examinations are required for admission, with a grade of "C" or
higher in each. The engineering degree programs at UC Berkeley are
academic and research-oriented; students who have completed diploma
programs after Ordinary Level examinations are not eligible for
admission.
NOTE: Countries that Require Military Service after Secondary
School: Students from countries that require entry into military
service upon completion of secondary education should not apply
until that obligation has been met. UC Berkeley does not defer
admission to a later term.
NOTE: If you have completed post-secondary course work after
graduating from secondary school, you are not eligible for freshman
admission. You must follow the eligibility regulations for transfer
applicants.
