Ответ:

my 65-year-old father

... an unusually hot day.

a little sick

in the shade

A passersby asked..., but my father.... to get home.

the other person stopped

The man realized....

That stranger saved my father's life.

suffered from a heart attack........for five days.

thank that passerby.... helping the the stranger...

Now, my father has many years left to enjoy his grandchildren.

be the Good Samaritan when they see the need.

The life could.