In an open net of a cube, a vertical strip consists of four faces from top to bottom ordered as: $@$, $\&$, $\%$, and $B$. Two additional side faces, $N$ and $\#$, are attached to the left and right sides of the $\%$ face, respectively. When this net is folded into a cube, which symbol will be opposite to '$\&$ '?

In an open cube net consisting of a straight strip of four square faces, the alternate faces are always opposite to each other when folded into a 3D cube.
Given the vertical strip from top to bottom:

1. $@$
2. $\&$
3. $\%$
4. $B$

* The face alternate to $@$ is $\%$, so $@$ is opposite to $\%$.
* The face alternate to $\&$ is $B$, so $\&$ is opposite to $B$.
* The side faces $N$ and $\#$ will fold up to be opposite to each other.

Therefore, the face opposite to '$\&$ ' is $B$.