Make the following plural: el profesor unos profesors los profesors los profesores unos profesores

El profesor       Los profesores

The plural of "el profesor" is "los profesores".

Explanation:

El profesor in English is "the professor". The plural would the "the professors". In Spanish the article changes when it refers to a plural noun. "El" is used for a singular masculine noun. In this case, the noun is profesor. The plural for that article is "los". "Unos" means "some", as in "some professors". It is plural but the meaning is different. The singular of "Unos profesores" would be "un profesor". In English: "Some professors" plural, "A professor", singular.