It is right there on the Eurasia map at the link you shared, and on the list of Eurasian territories, so OP was correct.
The thing is that “continental Europe” is not the same as the continent of Europe, which does include the islands. Mainland Europe is a less ambiguous name.
England is not a part of the Eurasian continent nor a part of Continental Europe. It’s on the Isle of Great Britain, which is an island, not a continent. She refused to admit she was wrong because she was right and your textbook was wrong.
It is right there on the Eurasia map at the link you shared, and on the list of Eurasian territories, so OP was correct.
The thing is that “continental Europe” is not the same as the continent of Europe, which does include the islands. Mainland Europe is a less ambiguous name.
Well, at least you share a tectonic plate, so that’s nice.