1. Swimming is one of the world's most popular water s______.
2. She's my best f______—we've known each other since we were five.
3. Do you want to p______ basketball with us?
4. They are getting along well. They often help e______ other.
5. My shoes are worn out. I need to buy a n______ pair.
6. It's very hot here, would you o______ a window please?
7. Mary has a camera. I often borrow it from h______.
8. There are t______ people in my family. They are father, mother and I.
9. You should always wash your hands b______ meals.
10. On Mary's birthday, we all said "H______ birthday" to her.