根据句子意思，用所给单词的正确形式填空。
1. ________ is very important. (healthy)
2. The ________ month of a year is February. (two)
3. We must clean our hands before ________ meals. (have)
4. He asked ________ to write down ________ names. (they)
5. What size are your son's ________ (foot) ?
6. Amy loves ________ (swim) and she is ________ (fun).
7. This is Sandy. Her ________ name is Shanshan. (China)
8. How many ________ can you see in the tree? (monkey)
9. It's not cold here in spring so it is ________. (warm)
10._______ is my favourite sport. (fish)