This worksheet is at its base a practice for pronouns (le, la, les, y, en). It uses sample sentences adapted from the book Les oeufs verts au jambon (a very repetitive book!) for practice. This product does NOT come with a copy of the book, but I highly recommend using it in conjunction with the worksheet. I usually read the book first, so the students can see the pronouns in action, then break it down for them to try on their own with this worksheet. They start with replacing nouns that I underline, then move to finding the nouns to replace themselves. Finally they write their own sentences using pronouns to add to the story.
The book is Les oeufs vert au jambon by Dr Seuss translated by Anne-Laure Fournier le Ray.