They cancelled all flights because of fog8/15They cancelled all flights because of fog.All flights because of fog were cancelled.All flights were cancelled because of fog.All flights were because of fog cancelledAll flights were cancelled by them because of fogGiải thíchĐáp án B Dịch: Họ đã hủy tất cả các chuyến bay vì bão. – Tất cả các chuyến bay đã bị hủy vì bão.