Great inventions change the world. They help people live {#blank#}1{#/blank#} better life. The wheel is perhaps the {#blank#}2{#/blank#}(great) invention in history. After {#blank#}3{#/blank#}(it) invention, travelling became faster and {#blank#}4{#/blank#}(comfortable). Without the wheel, we would not have carriages, trains and cars. In 1867, the telephone, one of the {#blank#}5{#/blank#}(one) practical inventions, was invented. Alexander Graham Bell was its {#blank#}6{#/blank#} (invent). Since then, people have been able {#blank#}7{#/blank#} (speak) to each other over long distances. Mobile phones allow people to keep in touch {#blank#}8{#/blank#} each other anytime, anywhere. Thomas Edison {#blank#}9{#/blank#}(develop) the practical light bulb in 1879. With light bulbs, people can do as many things in the evenings {#blank#}10{#/blank#} they can in the daytime.