Here's a multiple choice quiz on basic plural spelling forms in English. It's a set of ten questions, which comprises all the regular spelling forms found in English. It does not include the irregular forms.
The PDF set includes a feedback notes page which will help you present or review the regular spelling rules after doing the quiz. You can have a look at the questions here.
You can also set it as a homework assignment and the QR code key will show the answer key for your students.