SOMETIMES ADVERTISING SIGNS ……….DOWN DURING A STORM AND PEOPLE ARE...

8. - TONG HOP KIEN THUC TIENG ANH THCS VA CAC BAI KIEM TRA THU
TONG HOP KIEN THUC TIENG ANH THCS VA CAC BAI KIEM TRA THU
8. Sometimes advertising signs ……….down during a storm and people are injured by them.A. blow B. are blown C. blew D. were blown