--- Robert is indeed a wise man.---Oh, yes. How often I have regretted_______his advice!

This means going back to the place where we left the family ____ in a tree the night before.

－I'm afraid that I couldn't pass the examination.－As a student，you need to believe in yourself________you have the ability to achieve any________goal.

Anyway, the crowd around me were obviously enjoying their day out at the races,         by their happy faces and the sense of excitement.

We finally managed to make the customers _______ of the quality of the vehicle.