Version 1
About thirty volunteers will be chosen from all over the world by 2019 to go to the Mars. The volunteers must be over eighteen years old, prepared not to return to the earth, and willing to keep a good relationship with other people. Some experts think that the living conditions on the Mars are hard because it is difficult for the volunteers to face the cold weather, loneliness and fear. The volunteers believe that if they are successful, they will become the heroes of human beings. What’s more, they are tired of living on the earth, so they want to experience the life on the Mars.
Version 2
By 2019, about thirty volunteers to go to the Mars will be chosen from all over the world. The volunteers, who must be over 18 and would like to keep a good relationship with other people, should be prepared not to return to the earth. Some experts believe that it is very difficult to live on the Mars because of the cold weather, loneliness and fear. Some volunteers hold the belief that they will be the heroes if they succeed. Moreover, they want to know what life is like on the Mars because they are tired of the life on the earth.

1、被动句：Up till 2019, about 30 volunteers will be selected to go to the Mars.
2、定语从句：Those volunteers, who are over 18, should be ready to stay at the Mars forever and willing to get along well with others.
3、宾语从句：The experts point out that the life in the Mars will be rather difficult as a result of the cold weather, loneliness and fear.
也可以考虑使用过去分词作状语  Faced with the cold weather, loneliness and fear, the life in the Mars will be rather difficult.
4、 However, the volunteers say that they are tired of the life in the earth and expect to experience the life in the Mars.
可以使用过去分词Tired of life in the earth, the volunteers expect to experience the life in the Mars.
5、 What’s more, they believe that they will be heroes once they succeed. 也可以使用if条件句What’s more, they believe that they will be heroes if they are successful.
【考点定位】
文章的取材来自于前段时间的移民火星的新闻话题，贴近时事。结合环保（地球生活太糟糕），志愿者招募，专家及个人看法描述命题。命题稳中有新。
考点涉及：被动句，定语从句，宾语从句，状语从句，关联词，it作形式主语，同位语，分词作状语等。
时态涉及到了一般现在时和一般将来时。