Complex sentence: In 1968 Mrema sat for the Cambridge University O-level exams, on which he got low marks.But he did manage to get a chance to joined the Kivukoni Political Education College, after which he was sent to marangu for further training.
Split into simpler sentences: In 1968 Mrema sat for the Cambridge University O-level exams. He joined the Kivukoni Political Education College, after which he was sent to marangu for further training.