根据下列句子及所给单词的首字母或中文意思。

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.