Badly dressed and speaking in a strange way, he must have ______ to the people present to be a silly old man. 

Keep on trying. Never _________. I am sure you will succeed sooner or later.

 – You seem to have learnt it by heart.--- Yes, I_________.

 After that, he knew he could ______ any emergency by doing what he could to the best of his ability.

. After many years’ hard work, his career really _____ and he became world famous.