Please capitalize where necessary: but sowing-time had come, and again tuomas sowed the field, and soon the grain had sprouted.
A: But sowing-time had come, and again Tuomas sowed the field, and soon the grain had sprouted.

Please capitalize where necessary: centrally located in sandton, park inn offers modern rooms with air conditioning.
A: Centrally located in Sandton, Park Inn offers modern rooms with air conditioning.

Please capitalize where necessary: over the same period i have also observed a great enthusiasm justified - as well as a sometimes regular black-hearted attitude by some academic circles.
A: Over the same period I have also observed a great enthusiasm justified - as well as a sometimes regular black-hearted attitude by some academic circles.

Please capitalize where necessary: another group drew fo-aarhus as a bi-celled amoeba with separate nuclei but with common, ever-changing plasma.
A:
Another group drew FO-Aarhus as a bi-celled amoeba with separate nuclei but with common, ever-changing plasma.