根据短文内容及首字母提示补全单词，使短文完整、通顺energy, invent, draw, until, dangerous,
create, in, tired, because, country
The bicycle is one of the simplest but most useful inventions in the world. What is the most surprising is that it was not {#blank#}1{#/blank#} earlier, although the great inventor Leonardo da Vinci had {#blank#}2{#/blank#} pictures for bicycles and flying machines and some other things. Those things were not produced {#blank#}3{#/blank#} long after he died.
A person riding a bicycle uses very little {#blank#}4{#/blank#} to make the bicycle move, and there is no pollution at all when you are riding. Even so, in most developed {#blank#}5{#/blank#} , most people don't go to work by bicycle. It is not {#blank#}6{#/blank#} the bicycles are expensive or people feel {#blank#}7{#/blank#} if they ride to work. It's because the number of cars on the roads becomes larger. It certainly becomes more {#blank#}8{#/blank#} to ride a bicycle. As a result, more people put their bicycles away and go to work {#blank#}9{#/blank#} their cars. And in this way, the situation is made more serious. Perhaps the best way to make riding safer and more popular is to {#blank#}10{#/blank#} paths only for bicycles.
