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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for H.S. seniors' exams:

SATS: H.S. seniors' exams
SAT: H.S. senior's exam
SATI: H.S. senior's exam
SATI: H.S. senior's exam, formerly
SATI: H.S. senior's exam, once
APTEST: Exam for some H.S. seniors