When kids in parts of the world want to play, they often make soccer balls out of trash tied together with string. “{#blank#}1{#/blank#} the areas used for playing fields are often rough and rocky, millions of real balls go flat (变瘪){#blank#}2{#/blank#} 24 hours,” says Tim Jahnigen, a California businessman. Determined to solve this problem,{#blank#}3{#/blank#} created an indestructible ball called the One World Futbol.

    The ball is made of {#blank#}4{#/blank#} special material, ethylene-vinyl acetate foam. It's lightweight, it's flexible, and—{#blank#}5{#/blank#} important—it holds its shape.

    The One World Futbol needs no pump {#blank#}6{#/blank#} won't wear out, even on rough surfaces. When tested,{#blank#}7{#/blank#} withstood (经受住) being crushed by a car, and even being chewed on by a lion.

    Although it costs more to produce {#blank#}8{#/blank#} a typical soccer ball, Jahnigen estimates the One World Futbol can last 30 years. So far, it's been given to kids in 143 countries. 

    Before the day {#blank#}1{#/blank#} the graduation ceremony was held, I took the graduation gifts into {#blank#}2{#/blank#}(consider). Early in the morning, I went to the department store {#blank#}3{#/blank#}(select) a gift for my teachers and classmates. {#blank#}4{#/blank#} (choose) carefully, I decided to buy some fancy cards for them. {#blank#}5{#/blank#} modern means of communication were so popular that I {#blank#}6{#/blank#} (feel) so sorry for the separation, I put {#blank#}7{#/blank#} my sorrow and gratitude in every card. In my view, {#blank#}8{#/blank#} is better than a card to express my current feeling. During the ceremony, we share our gifts and express our deep love. Separation is {#blank#}9{#/blank#} great sorrow to everyone. In the end, my classmates and I sang the song titled "Auld Lang Syne", which is{#blank#}10{#/blank#}(suitable) song to say goodbye.

You Are a Time Traveler

    Time travel has long fascinated people. Traveling to the past or future would allow you to live in exciting periods of history or get a glimpse(一瞥) of {#blank#}1{#/blank#} the future holds. Think about it. If you could travel in time, where would you go? Perhaps you would voyage far ahead of the present day {#blank#}2{#/blank#} (meet)your future self! What about watching an original performance of {#blank#}3{#/blank#} Shakespeare play in Elizabethan England? Or maybe you would pay a visit to {#blank#}4{#/blank#} (you)as a baby.

    Since these ideas are universally appealing to everyone, it is {#blank#}5{#/blank#} (nature)that time travel interests so many writers, filmmakers, and scientists. It has been depicted in a {#blank#}6{#/blank#} (various) of media, such as literature, film, and science reports. But you might be surprised to realize that {#blank#}7{#/blank#} the smallest sense of the term, we are all time travelers. Even as you sit here {#blank#}8{#/blank#} (read)this article, time is racing forward. The future becomes the past as soon as it happens. The present is so fleeting(稍纵即近)! Everything you do quickly {#blank#}9{#/blank#} (become) part of the past, and so it is that we move through time. The famous scientist Albert Einstein, assigned a mathematical formula to this idea, {#blank#}10{#/blank#} is called The Theory of Relativity.