rellenaban

form-of imperfect indicative plural third-person

rellenarの第三人称複数未完了法

English Meaning

third-person plural imperfect indicative of rellenar

Durante el examen, los alumnos rellenaban cuidadosamente sus hojas de respuestas.

試験中、生徒たちは慎重に解答用紙に記入していました。

During the exam, the students were carefully filling in their answer sheets.