哪些是正确的 like 运算表达式?

哪些是正确的 like 运算表达式？

A.select * from net_46 where s_name like ’晓’

B.select * from net_46 where s_name like ’&晓&’

C.select * from net_46 where s_name like ’$晓$’

D.select * from net_46 where s_name like ’%晓%’