The fire-fighters made every effort to put off the flames. The building burned down completely

The fire-fighters made every effort to put off the flames. The building burned down completely
A. The building burned down completely though the fire-fighters made every effort to put off the flames.
B. Had it not been for the fire-fighters’ every effort, the building would have burned down completely.
C. Making every effort to put off the flames, the fire-fighters completely burned down the building.
D. Since the fire-fighters made every effort to put off the flames, the building burned down completely

Đáp án: A
Dịch: Những người cứu hỏa làm hết sức để dập tắt ngọn lửa. Tòa nhà bị thiêu rụi hoàn toàn.
/