1. образуйте множественное чисто тех имен существительных, которые относятся к категории исчисляемых. cat, watch, sugar, milk, box, piano, photo, monkey, money, man, woman, hair, child, roof, tooth, knowledge, news, teacher, face, student, pupil, language, subject, year, lnife, tea, ice, friendship.
watch-watches
sugar-sugar
milk-milk
box-boxes
piano-pianos
photo-photos
monkey-monkeys
money-money
man-men
woman-women
hair-hair
child-children
roof-roofs
tooth-teeth
knowledge-knowledge
news-news
teacher-teachers
face-faces
student-students
pupil-pupils
language-langueges
subject-subjects
year-years
knife-knives
tea-tea
ice-ice
friendship-friendship
Насчет последних трёх не уверена