单项选择题

A．Regular driver training.
B．Improved highway design.
C．Stricter traffic regulations.
D．Better public transportation.
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单项选择题
A．Have a rest.B．Drink lots of water.C．Takes vitamin C.D．Warm herself.
A．Have a rest.
B．Drink lots of water.
C．Takes vitamin C.
D．Warm herself.
单项选择题
A．Teacher and student.B．Husband and wife.C．Classmate and classmate.D．Boss and secretary.
A．Teacher and student.
B．Husband and wife.
C．Classmate and classmate.
D．Boss and secretary.
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