Plenty of people dream of going to Mars(火星). {#blank#}1{#/blank#} different from those people, 13-year-old Alyssa Carson has been working {#blank#}2{#/blank#} (happy)for that dream since the age of 4, according to a new report which {#blank#}3{#/blank#} made by the BC not long ago.

    Alyssa tells the BBC, "I hope {#blank#}4{#/blank#} (go)to Mars because it is a place that no one has been to before. I want to take that first step. "According to the BBC, she {#blank#}5{#/blank#}(attend)USA's three world space camps so far.

    Her father, Bert Carson, tells the BBC that Alyssa plans to be on the first long journey to Mars, which is expected to take place in {#blank#}6{#/blank#} year of 2033. "We are proud {#blank#}7{#/blank#} her, "he says." We have the next eighteen {#blank#}8{#/blank#} (year)planned out. "One of those plans is Alyssa attending the International Space University.

    Of course, Alyssa's dream could come with {#blank#}9{#/blank#} (big)sacrifices(牺牲)than others. If Alyssa goes to Mars, maybe {#blank#}10{#/blank#} is very difficult for her to return to Earth. Still, her father says, "If that's the only choice she has, she still wants to go." Alyssa agrees.

    Do you want to travel on your own? Being {#blank#}1{#/blank#} exchange student is {#blank#}2{#/blank#} good way. Exchange students can live in a foreign country and learn {#blank#}3{#/blank#} (it) language and culture. Students go to a local (当地的) school {#blank#}4{#/blank#}live with a host family, often for six {#blank#}5{#/blank#} (month) to a year. These programmes {#blank#}6{#/blank#} (be) very: good for students. They can learn a lot about a {#blank#}7{#/blank#} (difference) culture. They can also learn to be more independent and {#blank#}8{#/blank#} (feel) more confident (自信的). Being an exchange student helps you {#blank#}9{#/blank#} (make) friends with different people. Besides, it can help improve your {#blank#}10{#/blank#} (understand) of the world. Exchange students share their own culture with people in the new country as well.