1 . The ball b__________ (弹起，反弹) twice before he could reach it. (根据中英文提示填空)

2 . The boy was________ (弹起) up and down on the bed. (根据汉语提示单词拼写)

3 . The volleyball hit the ground and b____________ high into the air. (根据首字母提示单词拼写)

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

5 . 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)

6 . The children had broken the bed by ________ (bounce) on it.(所给词的适当形式填空)

7 . She   _______(蹦) up and down excitedly on the bed. (根据汉语提示单词拼写)

8 . The ball ________ (弹回) twice before the little boy could reach it. (根据汉语提示单词拼写)

9 . If the air in a ball is not enough, it would be hard for it to b ________ when it’s dropped to the ground.(根据首字母单词拼写)