在下列各句的空格内填上一个适当的完整的单词，该词的首字母已给出。

1. It's cold outside. Please put on your w________ winter coat.

2. Last year we p________ a lot of trees around our school. And now they grow well.

3. This backpack is c________ but he still can't afford it.

4. May is the f________ month of the year.

5. Don't worry about me, mom. I can take care of m________.