填空题.President Obama is not one of the richest presidents. The president receives a salary of $400,000 a year as president, which, while 41 , isn't even close to today's top executives salaries. The president's annual income has actually 42 steadily since he entered office. In 2009, the president's adjusted gross income was $5.5 million. That 43 fell to less than $1 million in 2012. This is primarily due to a drop-off in revenue from his prior book deals. 24/7 Wall St. estimates the president's net worth to be $7.5 million. The net worth of the presidents varies widely. George Washington's estate was worth more than half a billion in today's dollars. On the other hand, several presidents went 44 . The fortunes of America's presidents are often tied to the 45 of their time. As the focus of the economy has changed, so has the way the presidents made their money. It is not 46 then to find that the first few presidents—from Washington's election to about 75 years later—were large landowners. They 47 made money from land, crops, and commodity speculation. Of course, this left them highly vulnerable to poor crop yields, and they could lose most or all of their properties because of a few bad years. By 1850, the financial history of the presidency 48 a new era. Beginning with Millard Fillmore, most presidents were lawyers who spent years in public service. They rarely amassed (积累) large fortunes and their incomes often came almost entirely from their 49 . These presidents were distinctly middle class and often 50 without the means to support themselves in anyway resembling the presidential lifestyle. Buchanan, Lincoln, Johnson, Grant, Hayes and Garfield had modest net worth when they died. A. bankrupt E. salaries I. economy M. entered B. retired F. spending J. generous N. increased C. surprising G. gorgeous K. dropped O. figure D. wealth H. generally L. average