【正确答案】It was hoped the robots would work for at least three mouths

【答案解析】细节题。(Para.3)It was hoped the robots would work for at least three months，but their longevity in the freezing Martian conditions has surprised everyone．人们本来只希望它们至少能工作3个月，但它们在火星冰冷的条件下仍能长寿，着实让人惊讶不已。

【正确答案】It has found all abundance of rocks and soils bearing evidence of extensive exposure to water．

【答案解析】细节题。 (Lines 1～2，Para.6)在火星找到大量含有水分的岩石和土壤。

【正确答案】Spirit has to drive backwards everywhere it goes because of a jammed wheel．

【答案解析】细节题。(Line 1，Para.9) Spirit因为车轮故障只能倒着行驶。

【正确答案】Three．

【答案解析】细节题。文中提到Spirit，Opportunity and Phoenix。

【正确答案】In future for NASA and the European Space Agency will be joint affairs because of the high cost of getting spacecraft down on to the planet．

【答案解析】细节题。(Lines 4～6，Para.11)因为向火星发射探测器代价高昂， NASA将来会与欧洲宇航局联手共同进行火星探测。