Please capitalize where necessary: her family was supportive; they were there for her whenever she needed them.
A: Her family was supportive; they were there for her whenever she needed them.

Please capitalize where necessary: there are those who put responsibility upon revolutionary doctrine for the mistakes and crimes of those who betrayed it; others who curse the medicine because it does not guarantee an instantaneous and miraculous cure.
A: There are those who put responsibility upon revolutionary doctrine for the mistakes and crimes of those who betrayed it; others who curse the medicine because it does not guarantee an instantaneous and miraculous cure.

Please capitalize where necessary: best results in playing street craps
A: Best Results In Playing Street Craps

Please capitalize where necessary: he was showing that such measurements could be made and, since he succeeds in showing this, his work is of major importance.
A:
He was showing that such measurements could be made and, since he succeeds in showing this, his work is of major importance.