Question

Употребите выделенные существительные в форме единственного числа
Mrs Smith's babies have got a lot of toys. Tim's stories are funny. Ted and Bob's puppies like to run. The children's families live in London. These cities are old.

Answer 1

1)baby.
2)puppy.
3)family.
4)city.
Если окончание во мн.ч. ies,значит в ед.ч. y.