Chuyển câu có cùng nghĩa tương đương

Driving too fast is dangerous, whether you are a careful driver or not.
=> However ................................................
We don't know whether he's pressed for work.
=> For all we know .......................................
Because my parents encouraged me, I am a good student now.
=> But for ......................................................
We couldn't go any further because the fog was so thick.
=> The thick fog made ...............................