select case 语句怎么判断在某两个值之间

select case 语句怎么判断在某两个值之间
如题
我要把
if a> 3 and a =5 and a 16 and a = 85
Grade = "优秀 "
Case Is > = 75
Grade = "良好 "
Case Is > = 70
Grade = "中等 "
Case Is > = 60
Grade = "及格 "
end Select
有错误,在vb中是正确的,但用asp里就有错误了
是asp
vbscript脚本