这两个句型是否正确：have nothing but to 、There is nothing to choose but to

这两个句型是否正确：have nothing but to 、There is nothing to choose but to
下面两个句型是否正确?
have nothing but to
There is nothing to choose but to
如果错误，请写出原因；如果正确，请写出例句。谢谢！