A SERIOUS CALLING IS CALLING VERY LATE AT NIGHT, OR VERY EARLY AT...

08. - KIEM TRA 1TIET SO 1 TRON 4 DE
KIEM TRA 1TIET SO 1 TRON 4 DE
08. A serious calling is calling very late at night, or very early at the morning.A. at night B. or C. serious calling D. at the morning