YOU SHOULD …THE LIGHTS BEFORE GOING OUT A. TURN OFF B. TO TURN OFF...

6. - CAU HOI ON THI MON ANH VAN BẬC 2 CÔNG CHỨC 2020
CAU HOI ON THI MON ANH VAN BẬC 2 CÔNG CHỨC 2020
6. You should …the lights before going out A. turn off B. to turn off C. turning off D. turned off