Hills Grammar solutions for general, 2 unit, and extension 2:
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011gs.pdf
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011-2us.pdf
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011s.pdf
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011gs.pdf
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011-2us.pdf
http://www.angelfire.com/ab7/fourunit/hillsgrammar2011s.pdf