Don't shout at him.  He is only ______ boy.[ ]

A.  a eight-year-old    

B.  an eight-year-old

C. an eight-years-old    

D.  a eight years old

治疗邪在少阳，寒热往来，应首选

A．葛根
B．柴胡
C．升麻
D．桑叶
E．薄荷