Before I started the car, all of the passengers..................their seat belts
Question: Before I started the car, all of the passengers..................their seat belts.
A. will buckle
B. had buckled
C. buckle
D. have buckled
Question: Before I started the car, all of the passengers..................their seat belts.
A. will buckle
B. had buckled
C. buckle
D. have buckled
Đáp án: B
Giải thích: Cấu trúc: Before S + QKĐ, S + QKHT
Dịch: Trước khi tôi khởi động xe, tất cả hành khách đã thắt dây an toàn.