1 . A young lady was sitting in her garden under a tree drinking tea. _______, something white fell and _______ in her drink. It was a cocoon(茧) . As the cocoon rumbled (发出隆隆声) in the hot _______, she realized that it was made from a long, strong and soft _______ . She started thinking about how to _______ the new material. Does this story sound a bit _______ ? It does remind me of Isaac Newton, having the _______of the law of gravity while sitting under an apple tree after he was _______ on the head with a piece of falling fruit.

The story of the young woman and her tea is a popular Chinese legend (传说) about _______ . When silk was first invented, silk clothing was ________ by the rich people, and it was a status symbol. But over time its use spread and a wider range of social classes ________ wearing silk clothes.

As the production of silk increased, it began to be put into industrial ________ and became a part of musical instruments, fishing lines, even wrap paper and trade business.

Silk was ________ traded and spread all the way from China to India and through Central Asia to the Middle East. It was the longest trade route across land, and it allowed early ________ between Europe and China. Italy became one of the major producers of silk and it’s   ________ some of the world’s finest silk cloth is made even today.

2 . Black people left the South for multiple reasons, including severe Jim Crow laws that denied black people their civil rights and economic conditions that made advancement next to impossible. They saw _______ for them to get in northern cities, where workers were needed during labor shortages _______ by World War I. Between 1915 and about 1960, northern industrial cities _______ five million black people, becoming majority black.

Many went to the northern city of Harlem - a New York neighborhood that had once been a rural _______ white area. During a real estate crash at the turn of the 20th century, the _______ of property became more willing to rent to black renters. Property values then _______ as white residents attempted to offload their real estate and move away. _______, the area became majority black, and Harlem tuned into an attraction for migrants _______ economic chance and a rich cultural and social life.

These _______ weren’t just from the American South: A group of people came from Caribbean countries like Jamaica, Antigua, and Trinidad, ________ economic downturns because of the decline of sugar prices throughout the West Indies.

That cultural ________ stimulated new types of expression and thought. Promoted by black churches and businesses, Harlem ________ life. There, a poor black worker could brush ________ with educated, wealthy black residents. They could take part in entertainment by black people, for black people. The Jamaica - born black, Marcus Garvey, even ________ the Universal Negro Improvement Association to ________ racial pride and economic independence.