Complex sentence: For many years, the school put on two full productions on the Fraser Hall stage and standards were so high that Representatives of the British Council expressed their amazement and said they had not seen as high a level even in England.
Split into simpler sentences: For many years, the school put on two, full productions on the Fraser Hall stage. Standards were so high that Representatives of the British Council expressed their amazement and said they had not seen as high a level even in England.