6th year

Link 1:  If or Unless? http://www.usingenglish.com/quizzes/23.html

Link 2: http://wwwedu.ge.ch/cptic/prospective/projets/anglais/exercises/condit1.htm

Link 3: 1st cond: http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/first-conditional.html

Link 4:  2nd cond: http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/second-conditional.html