根据上下文意思用所给单词的适当形式填空或者填入所缺单词。
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 its invention,
travelling became
faster and {#blank#}3{#/blank#}(comfortable).
Without the wheel,
we would not have
carriages, trains and {#blank#}4{#/blank#}(car). In 1867, the telephone, one of the most {#blank#}5{#/blank#}(practice) inventions, was invented. Alexander Graham Bell was its
{#blank#}6{#/blank#}(invent). Since then, people {#blank#}7{#/blank#}(be) able to 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.
