DSE 2021 Paper 1A Q21-22, HKCEE 2001 Paper 2 Q33-34, DSE 2012 Paper 1A Q28, HKCEE 2004 Paper 2 Q55, HKCEE 2002 Paper 2 Q18, HKCEE 2006 Paper 2 Q60, HKCEE 2007 Paper 2 Q17, HKCEE 2006 Paper 2 Q30-31, DSE 2012 Paper 1A Q29, HKCEE 2007 Paper 2 Q16, DSE 2019 Paper 1A Q12, HKCEE 2010 Paper 2 Q29, DSE 2012 Paper 1A Q25-26, DSE 2017 Paper 1A Q19-23, DSE 2014 Paper 1A Q28, HKCEE 2005 Paper 2 Q34, HKCEE 2010 Paper 2 Q30, DSE 2012 Paper 1A Q27, HKCEE 2006 Paper 2 Q29, HKCEE 2008 Paper 2 Q27, HKCEE 2009 Paper 2 Q48, HKCEE 2007 Paper 2 Q52