Grammar Sense, Second Edition
Sample Material
Level 1: http://oupcanada.com/images/elt/GS_1_Sample_Pages.pdf
Level 2: http://oupcanada.com/images/elt/GS_2_Sample_Pages.pdf
Level 3: http://oupcanada.com/images/elt/GS_3_Sample_Pages.pdf
Level 4: http://oupcanada.com/images/elt/GS_4_Sample_Pages.pdf