Hold the line, please <a href="http://buese.es/index.php/tadasoft-40-mg-0fi0">tadasoft 40</a> NEW YORK, Aug 5 (Reuters) - U.S. stocks fell on Monday,retreating from last week's record highs and mostly extendingtheir declines after a top Federal Reserve official said thecentral bank is closer to curbing its bond purchases.