《2025年基础训练大象出版社八年级英语上册人教版》

D
Some people believe that humans will live on the planet Mars in the future. Our own planet, the earth, is becoming more and more crowded and polluted. 36. _
At present, our spacecraft (宇宙飞船) are too slow to carry large numbers of passengers to Mars — it takes months. With the development of science and technology, the spacecraft will travel at the speed of light. 37. However, many people may feel uncomfortable and sick because of the fast speed.
Compared with life on the earth, life on Mars will be better in some ways. People will have more space. 38. _ Robots will do most of their work so that they can have more time to relax. There will probably be no schools on Mars. Every student will study at online schools with e-teachers.
However, there will be some problems if people live on Mars. 39. _ Nobody knows for sure whether there will be enough water or air on Mars for people. Besides, scientists are not sure whether all plants will grow on Mars well. Food will probably be in the form of pills (药片) and will not be so tasty.
Life on Mars will be interesting and challenging. 40. _ So the most important thing we need to do now is to protect our beautiful blue planet — the earth!
根据材料内容,从下面五个选项中选出能填入文中空缺处的最佳选项,使文章意思通顺、内容完整。
A. Humans can't live without water, air or food.
B. They hope that humans will build a better world on Mars.
C. It may take us hundreds of years to make the dream come true.
D. They will live in the houses with large and comfortable rooms.
E. So the journey may only take about 20 minutes in the future.

答案： BEDAC