Question

Answer 1

c - a - a - b - b 
/s/ : books, clocks, desks, students, maps, sinks, lamps
/iz/ : couches, benches, glasses, brushes
còn lại /z/

Answer 2

I. 1-C; 2-A; 3-A; 4-B; 5-B

II.

/iz/: couches, benches, glasses, brushes.

/s/: books, clocks, desks, students, maps, sinks, lamps.

/z/: doors, windows, boards, bags, pencils, schools, classrooms, teacher, beds, calculators, villas.