Choose the best choice from A，B or C according to what you read．

66．The charts above are about 　　．

A．	traffic accidents
B．	safety
C．	health

67．Which is not the factor from drivers？ 　　

A．	Drunk driving
B．	Speeding
C．	Road environment

68．How many factors cause traffic accidents？ 　　

A．	7
B．	4
C．	3

69．What does the word"vehicle"mean in Chinese？ 　　

A．	安全带
B．	机动车辆
C．	行人

70．From the charts we know that 　　．

A．	road environment is the main factor of traffic accidents
B．	tired driving is the most factor from drivers
C．	a quarter of the drivers don't use seat belts．