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完形填空。
Do you hope to move to another city or a foreign country?It may be interesting．But how about moving to 1 planet?A US company now has a plan：sending people to Mars 2 20 years．
To begin with,the company plans to send 3 people to go to Mars first．It will 4 them several months to get there．When they arrive,they will build a 5 first．
But Mars is not an easy place to 6 ．It is rocky,cold and has lots of sandstorms(沙塵暴)．Also,there is 7 air for breath．So people would have to live in a special house．They would have to 8 special clothes if they go out．
People will have to find 9 resources(資源),iron,water and so on．All these could help people live there…
Sounds interesting?You might want to go to Mars now． 10 will things go well as the company hopes?We'll wait and see．
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