The oil-paper umbrella has a history of over 1，000 years in China.It was u （1）

sed

sed

as a water-proof tool for daily use.
   There are different stories about the umbrella in China.The most popular one is related to Lu Ban.He said that once he and his younger sister visited the West Lake.It started raining （2）

suddenly

suddenly

（sudden）.The sister said， "Let's have a competition，before sunrise tomorrow，who comes up with a way to make it p （3）

ossible

ossible

for people to visit the West Lake even on rainy days will be the winner." Lu Ban thought it was easy.He collected some tools and （4）

materials

materials

（material）.Then he spent the whole night （5）

building

building

（build） 10 pavilions （涼亭） around the lake.He was quite confident about his work.
   The next morning，when Lu Ban talked about his achievements and felt p （6）

roud

roud

his sister held something unusual in her hand.It could be opened into a round s （7）

hape

hape

.Lu Ban was surprised.He found that the object made （8）

of

of

silk and bamboo could be opened and closed easily.It was light，beautiful and easy to c （9）

arry

arry

.Lu Ban said "You win.Your pavilion can protect us from rain." So the umbrella was invented.
   Later when paper was invented，people use much cheaper paper to replace silk，cutting the c （10）

ost

ost

of umbrellas.To make the umbrella water-proof，people brushed tung oil （桐油） across the surface.That was how the oil-paper umbrella was invented.