The way gravity changed The gravity became very strong The gravity disappeared It became very light., The weight changed He became very heavy. He had no weight and could float around like a feather. He was about one-sixth of his weight on the earth.. Task3：重点短语：在课文中找出来并写在学案上。

1. 有干什么的机会

2. 去太空旅行

3. 太空引力

4. 慢慢升空

5. 有能力干...

6. 从树上跳下来

7. 跌落到地上

8. 感觉好像

9. 离月球更近了

10. 高兴起来

11. 失重地漂浮着

12. 向前迈步

13. 既然

14. 爆发

Task 4:key sentences(find out and translate them )

1.I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.

2.walking does need a bit of practice now that gravity has changed.

3.Leaving the moon's gravity was not as painful as leaving the earth's.

4.we watched, amazed as fire broke out on the outside of the spaceship as the earth's gravity increased.

5.That was very exhausting but very exciting too.