6 1 50 students book 1 Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author melanie williams Primary Author mixed material 9781405848800 Inggris Pearson Education 2006 STUDENTS BOOK Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author mixed material 0582796938 Inggris Pearson Education cover_opportunities_1_students_book.jpg STUDENTS BOOK Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author mixed material 0582796989 Inggris Pearson Education 2004 cover_opportunities_2_students_book.jpg Students book Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author mixed material 0582817889 Inggris Pearson Education 2004 cover_opportunities_3_students_book.jpg language powerbook Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author mixed material 0582817897 Inggris Pearson Education 2004 cover_opportunities_3_language_powerbook.jpg students book 3 Harris, Michael Primary Author david mower Primary Author anna sikorzynska Primary Author melanie williams Primary Author mixed material 9781405848976 Inggris Pearson Education 2007