GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 777N5CVKACSS17SZK

Virtually everyone who speaks Torvic lives in Torvia, a small country that takes pride in its unique culture. Since Torvia trades with many other countries, however, most people who live in Torvia speak several languages, and many languages are taught in Torvia's public schools. Nevertheless, from these facts it should not be inferred that most speakers of Torvic speak several languages, because ________.