Libro de Texto:VALID CHOICE 2 EJER CAT BURLINGTON 2BACH 2009 INGLES CUADERNO DE TRABAJO CATALUÑA Lengua extranjera: inglés
PDF Practice Exercises 1 - 27 1. 2. 3. 4.
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UBA - Ciencias Economicas - Microeconomia - 1er Examen ...
PRACTICE EXERCISES 1 - 27: Test the validity of each argument. 1. If I plant a tree, then I will get dirt under my nails. I didn't get dirt under my nails. Therefore, I didn't plant a tree. 2. If I don't change my oil regularly, my engine will die. My engine died. Thus, I didn't change my oil regularly. 3. All frogs are amphibians.