1 . Tom ________ (蹦蹦跳跳地进来了), smiling broadly. (根据汉语提示完成句子)

2 . In tennis you have to hit the ball before its ________ (第二次弹跳).(根据汉语提示完成句子)

3 . When this type of balloon is filled with h________ (氢气), it b________ ________. (蹦来蹦去) （根据中英文提示填空）

4 . Some people know what they want to do from a young age, but many others just have a few ideas ________ ________in their heads.
有些人年轻时就清楚自己想做什么，但也有许多人只是有一些想法在脑子里晃来晃去。

5 . She ________________ (蹦蹦跳跳) excitedly on the bed. (根据汉语提示完成句子)

6 . The basketball ________ (反弹) over his shoulder into the net. （根据汉语提示单词拼写）