8. _____________________(我可以坐) by the window, sir? I want to ___________________________________(看看外面美丽的景色).

7. I am wondering ____________________(你是否已经检查了你的作业)?

6. Gravity will be a problem ____________________ (对于早期的火星定居者来说).

5.Are you certain ____________________________(是否有许多人想去火星上旅游)?

4. Many people believe ___________________(机器人将做大部分工作)

3. In the future, our space shuttles ______________ (能以半光速飞行吗)？

2.The programme ______________________________(以一个关于学习和业余爱好的关系的讨论开始)yesterday .

1.I don’t think we could________________________(住在火星上会生病)

9.m __________　 10. s___________

5.m___________　 6.i__________　 7. s___________　 8. o__________