Question

Образуйте форму множественного числа следующих существительных:

frog, party, roof, wife, driver, play, tomato, speed, box, paper,
student, baby friend, bench, knowledge, tooth, lady, deer, life, bus,
sea, mouse, coffee, story, woman, hour, gold, tea, foot, street, mother.

Answer 1

frogs, parties, roof, wives, drivers, plays, tomatoes, speeds, boxes, papers (если в смысле научная статься, если в смысле бумага, то окончание не добавляется), 
students, babies, friends, benches, knowledge, teeth, ladies, deer, lives, buses, 
seas, mice, coffee, stories, women, hours, gold, tea, feet, streets, mothers.