You might fall if you're not careful.
A. Unless you are careful, you might not fall.
B. If you are careless, you cannot be easy to fall.
C. Be careful or else you will have a fall.
D. You are not careless and you could not fall.
Đáp án đúng: C
Dịch: Cẩn thận nếu không cậu sẽ bị ngã đó.
Although the traffic was bad yesterday, I arrived at the meeting on time.
I think you'll find the house easily, as the directions are quite clear.