高考喜讯的英语表达可以有以下几种：

Wish you good luck in the college entrance exam.

I wish you success in the college entrance exam.

Be overjoyed at the good news.

The good news put him in fine fettle.

这些表达都可以用来传达高考喜讯，具体使用哪个可以根据语境和表达习惯选择。