10．
There are basically two ways of driving in the world：if the driver's seat is on the left and cars
travel on the right side of the road，it is called"left-hand driving"，as it is in China；Instead，it is called"right-hand driving"，as it is in Britain．Nowadays，around 65% of the world's population drives on the right of the road，while the rest is used to driving on the left．
Though no one knows the exact reasons，it seems likely that people in ancient times travelled on the left．Roman coins show pictures of horsemen passing on each other's
right．And right-handed people generally got on a horse from mthe animal's left．Obviously，it's safer to do this at the left side of the road，so it makes sense for the horse to be ridden on the left．
A change happened in the late 1700s．When Napoleon conquered（攻占）nations，he forced them to travel on the right side of the road，which spread left-hand driving throughout Europe．However，Britain still stuck with the right-hand driving role and countries which were part of the British Empire were made to follow．This is wh，India，Australia and the former British colonies （前英国殖民地）in Africa continue to drive on the left．One exception is Egypt，as that country was defeated（打败）by Napoleon before becoming part of the British Empire．
Some countries changed sides'until modern times．Sweden only moved to driving on the right I in 1967and Iceland changed the following year．Ghana changed sides'in 1974．On September 7，2009，Samoa became the third country ever to change from left-to right-hand driving for the reason that it made it easier to import（进口）cheap cars from right-hand driving Japan，Australia and New Zealand．
So if you want to travel to mother country or go on business，make sure you know whether it is left-or right-hand driving to avoid unnecessary troubles．
49．Nowadays，Bof the world's population drives on the right of the road．
A．around 74%
B．around 65%
C．around 19%
D．around 17%
50．On Roman coins we can see pictures of horsemenB
A．travelling throughout Europe
B．passing on each other's right
C．practicing riding in the country
D．getting on the horses from the right
51．Which of the following is true according to the passage？C
A．Sweden changed to drive on the right in 1974．
B．People drive on the left side of the mad in Egypt．
C．Napoleon helped with the spread of left-hand driving．
D．People have known the exact masons for driving on the left．
52．What is the writer's purpose for writing this passage？C
A．To explain the advantages of the two ways of driving．
B．To compare the diffemnces of the two ways of driving．
C．To introduce the development of the two ways of driving．
D．To complain about the change of the two ways of driving．
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