1. retake an exam
You can always retake an exam if you fail.
Mr. Smith had sought help in getting permission to retake an exam required to become a conservation officer with the state Department of Environmental Protection.
2. retake the exams
英語 "という言葉ponownie przystępować do egzaminów"(retake the exams)集合で発生します。
Edukacja-oceny i egzaminy