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

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