考考你的记忆力，根据句意及首字母补全在本课中出现的单词。

1.Brian has four books f _____ of stamps.

2.Stamp collecting would be an e _____ hobby.

3.The hole is too small. I can’t go t _____ it.

4.It’s spring It’s the best to g _____ trees.

5.“See the s _____ I put on the box, ”Danny said.