题目内容：
回答题：Driving Cars，trucks and motorcycles is an important part of our lives．We do it every day to get to work，to schoolor to friends’houses．
Driving can be very convenient，but Can also cause many probh；ms．Waiting in line at a redlight，a driver may get impatient and decide just to drive right throug hit．If another Car is comingfrom the other direction，there might be a terrible accident．Cuttinganother Car off Can make itsdriver angry，SO that drivercuts off someone else．Pretty soon everyt ody is angry，and impatient．Traffic accidents declinemillfions of lives every year worldwide．In Taiwan alone，over seven
people arekilled in accidents every day．The annual death rate(年死亡率)from traffic accidents in Taiwanis twice that of Japan．
To allowtraffic to move smoothly and safely，everybody must follow the rules．Before you
drive，learnall the traffic laws．That way of driving is safe，conven ent and even fun
The word“convenient”in thepassage means__________． A．handy，easyto do
B．that can be changed
C．fond of drinking and merry-making
D．carrages or other trucks
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