Not i but my brother ___ going to america

问题描述:

Not i but my brother ___ going to america
A.am
B is
not ...but 就近原则是吗

也不能说是就近原则,可以理解为是一个省略句.
Not I后省略了am going to america.这样后面用is就顺理成章了,是否好理解一点!