阅读下面短文,根据上下文或括号内单词等提示,在空白处填入适当的单词或括号内单词的适当形式。The oil-paper umbrella has a history of over 100 years in China. It used to be a tool for daily use.
There are different {#blank#}1{#/blank#} (story) about the origin of the umbrella in China. The most popular one is related to Lu Ban. It is said that once he and his younger sister visited the West Lake. It started raining suddenly. The sister said, "Let's have a competition. Before sunrise tomorrow, {#blank#}2{#/blank#} one who comes up with a way for people to visit the West Lake on rainy days will be the {#blank#}3{#/blank#} (win)." Lu Ban thought it was easy. He collected tools and materials and spent the whole night {#blank#}4{#/blank#} (build) pavilions (凉亭) around the lake. He was quite confident about his efforts.
The next morning, when Lu Ban was talking proudly about his achievements, his sister held something {#blank#}5{#/blank#} (usual) in her hand. Lu Ban was surprised. He found that the object {#blank#}6{#/blank#} (make) of silk and bamboo could be opened and closed {#blank#}7{#/blank#} (easy). It was light, beautiful and easy to carry. Lu Ban said "You win. Your 'pavilion' can protect us {#blank#}8{#/blank#} rain." And the umbrella was invented.
Later, when paper was invented, people used much {#blank#}9{#/blank#} (cheap) paper to replace silk, cutting the cost of umbrellas. To make the umbrella waterproof, people brushed tung oil (桐油) across the surface. That was {#blank#}10{#/blank#} the oil-paper umbrella was invented.