根据所给单词，在空格填入一个正确的形式。

1. We want to know _______ (Canada) hobbies.

2. They might organize a stamp _______ (collect) club.

3. She taught _______(she) English since she was fourteen.

4. He had fun _______(trade) stamps.

5. Making model train will be an _______ (enjoy) hobby.