Sites com atividades/exercícios on-line:
Basta acessar os links abaixo:
http://www.englishvocabularyexercises.com/Grammar%20exercises/causatives.htm
http://www.usingenglish.com/quizzes/221.html
http://www.perfect-english-grammar.com/causatives-exercise-1.html
http://www.perfect-english-grammar.com/causatives-exercise-2.html
