There is a cube whose six faces are marked with $3$, $4$, $5$, $6$, $7$, and $8$. If the sum of every two numbers that are on the opposite faces are the same, the number on the opposite face of $4$ is~\uline{~~~~~~~~~~}~ 
选项为:A:$$3$$  B:$$5$$  C:$$6$$  D:$$7$$  E:$$8$$  请回答其中一个选项.