Could there be life on Mars?　　按首字母填空

Could there be life on Mars?　　按首字母填空
Could there be life on Mars?　　You probably know a lot about the city you live in.You may even know some interesting facts about our earth.But how much do you know about M________,the planet where many think there may be l________?　　For many years,people have studied Mars.They have sent instruments (仪器) and r________ to the red planet.Some of them succeeded,but most f________.　　The first spacecraft (航天器),Mariner 4 from America,got a c________ look at Mars on November 28,1964.Mariner 4 showed Mars had a red surface with many big h________.There were also signs that there had been w________ on Mars.Of course,scientists wouldn’t miss the opportunity(机会)to send spacecraft to the red planet when it is so close to us.
NASA，National Aeroonautics and Space Administration(美国国家航天宇航局），sent two robots to mars in June and July.In January 2004,they t______to Mars at some 12,000 miles per hour.The two robots will then begin a 3 month s______to look for evidence(证据）of water and life from Mars.
One day,humans will travel to Mars to have a even closer look at the earth's red n____.
Maybe it could be you.