<prompt> Translate the following text to EnglishKatika miaka ya 1920 na 1930, GAO ilizingatia kazi ya malipo ya pre-auditing na ikiwa matumizi ya serikali yalikuwa yametibiwa kisheria.  <response>: During the 1920s and 1930s, GAO focused on preaudit payment work and whether government spending had been handled legally. 