I’d say you’re right. I might even say it’s “those new verses of yours” since “iste” often implies some connection with the person you’re speaking to.
With “tolletur” though, it’s future, right? So the answer key also has that mistake.
I don’t know what it says about me, but I read “tollo” here as “destroy”. Without context, it hards to decide, but keep in mind that “tollo” can mean a lot of different things.