Which of the following on the night parts is different in pronunciation with others

Her hair became gray ____ the passing of the years

At home, he keeps some pets, to which he ______ all his spare time.

The hospital nowpatients by name, not case number．

Hi,Tom.Did you go to the party?— Yes,but I really________have,because I had lots of work to do.I had to work far into the night to finish it.[ ]