IF THE WIND ... SO STRONG, THE BRIDGE WOULDN'T HAVE COLLAPSED....

22. - BAI KIEM TRA 15 UNIT 9 10 11 LOP 10
BAI KIEM TRA 15 UNIT 9 10 11 LOP 10

22. If the wind ... so strong, the bridge wouldn't have collapsed.

A. hadn't be B. wouldn't be C. hadn't been D. wouldn't be