Bent stripes，called chevrons(人字型)painted on the roads made drivers think that they are driving faster than they really are，and thus drivers slow down．Now the American Automobile Association Foundation for Traffic Safety in Washington D．C，is planning to repeat Japan's success．Starting next year，the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway accidents．High speed plays a major role in as much as one fifth of all deadly traffic accidents，according to the foundation．To help reduce those accidents，the foundation will carry out its tests in areas where speed related dangers are the greatest curves，exit slopes(斜坡)，traffic circles，and bridges．Some studies suggest that straight，horizontal(水平的)bars painted across roads can cut the average speed of drivers in half．However，traffic often returns to full speed within months as drivers become used to seeing the painted bars．Chevrons，scientists say，not only give drivers the impression that they are driving faster than they really are but also make a road appear to be narrower．The result is a longer lasting reduction in highway speed and the number of traffic accidents．
（ ） 15．The passage mainly discusses _________．
A．a new way of highway speed control
B．a new way of painting highways
C．a new way of training drivers
D．the uses of optical illusion
（ ） 16．On roads painted with chevrons，drivers tend to feel that _________．
A．they should keep distances from other cars
B．they are driving in the wrong way
C．they should slow down their speed
D．they are close to the speed limit
F
The very wealthy English Baron Fitzgerald had only one child，a son，who understandably was the apple of his eye．His wife died when the child was in his early teens．So Fitzgerald devoted himself to fathering the kid．Unfortunately the son died in his late teens．
Meanwhile，Fitzgerald's wealth greatly increased．He spent a lot on art works of the masters．Later Fitzgerald himself became seriously ill．Before his death，he had carefully prepared his will as to how his wealth would be settled—to sell his entire collection at an auction(拍卖)．
Because of the large quantity and high quality of his collection，a huge crowd of possible buyers gathered for the auction．Many of them were museum directors and private collectors who eager to bid(出价)．Before the auction，the art works were shown，among which was a painting of Fitzgerald's son by an unknown artist．Because of its poor quality，it received little attention．
When it was time for the auction，the auctioneer gaveled(敲槌) the crowd to attention．First the lawyer read from Fitzgerald's will that the first art work to be auctioned was the painting of his son．
The poor—quality painting didn't receive any bidders…except one—the old servant who had served the son and loved him，and who for emotional reasons offered the only bid．
As soon as the servant bought the painting for less than one English pound，the auctioneer stopped the bidding and asked the lawyer to read again from the will．The crowd became quiet，and the lawyer read from the will：“Whoever buys the painting of my son gets all my collection．”Then the auction w
