The passengers on the bus watched with sympathy as Susan made her way carefully up the steps. She paid the driver and then, using her hands to   1  the seats, settled in one of them.

It had been a year since Susan became blind. As the result of an accident she was suddenly thrown into a world of    2  . Susan’s husband Mark watched her   3  into hopelessness and he was  39   to use every possible means to help his wife.