题目内容：

根据句意和汉语注释，写出单词的正确形式，每空限填一词。

1.I live on the fifth floor, and my sister lives on the floor        (上面).

2.We are going on a __________(宝藏) hunt this afternoon.

3.Just go       (径直) along the road, and you’ll see the bookshop on your right.

4.There is too much __________(来往车辆) in this street every morning．

5.Spring comes, old         (叶子) are falling down and the new ones are growing.