Final Answer:
1. Scientists’ studies of cancer helps them to find cures.
2. Many bats make their homes in caves.
3. The sun’s rays are really warm today.
4. The frogs’ croaking is annoying me.
5. The students’ grades in math are down this term.
6. The library’s collection of books also contains audio books.
7. This is the way to the ladies’ room.
8. You are sitting in James’s seat.
9. This is the girls’ change room.
10. The robins’ nest has eggs in it.
11. My aunts’ flight was delayed by an hour.
12. The students’ books were scattered all over the floor.
Parent Tip: Review the logic above to help your child master the concept of using apostrophes worksheet.