There did not use to be many traffic accidents before
→ Now there are many traffic accidents
Giải thích: Nghĩa câu trên là "Khi xưa chưa có nhiều tai nạn giao thông" ⇒ phải trả lời là hiện tại có nhiều tai nạn giao thông.

english

Traffic safety is everyone's happiness. But there is a sad fact that in our country, the phenomenon of violating traffic laws causing unsafety still occurs. Behaviors such as not wearing a helmet, running a red light, going in the opposite direction... happen more and more. As a result, the number of traffic accidents is increasing. That will seriously affect the safety of people when participating in traffic. The cause of the above situation comes from the consciousness of each road user. Therefore, from family, school and society must together educate each person to strictly obey traffic laws. Always be aware that traffic safety will bring happiness to everyone.