WASHINGTON (AP) — U.S. businesses added jobs at a steady pace last month, with construction and manufacturing showing solid gains, a private survey found. Payroll processor ADP says that businesses added 190,000 jobs last month, up from 177,000 in July, but below a six-month high in June of 231,000. The figures suggest that turmoil in the financial markets and worries about faltering growth in China have not yet had much impact on the U.S.