人教版九年级英语Unit 5 What are the shirts made of Section A Grammar Focus4c 分层练习 一、基础巩固练习（Grammar Focus） 任务1：语法填空 根据Grammar Focus中的句子结构，用所给词的适当形式填空。 1. The shirts _____ (make) of cotton. 2. These toys _____ (produce) in China. 3. The paper _____ (use) for writing. 4. The flowers _____ (grow) in the garden. 5. The bridge _____ (build) last year. 任务2：句型转换 将下列句子改为被动语态。 1. People grow rice in the south of China. → Rice _____ in the south of China. 2. They produce cars in this factory. → Cars _____ in this factory. 3. We use wood to make paper. → Wood _____ to make paper. 4. The workers built the house in 2020. → The house _____ in 2020. 5. The teacher asked the students to clean the classroom. → The students _____ to clean the classroom. 二、能力提升练习（4a4b） 任务3：阅读理解（短文1） 阅读下面的短文，回答问题。 The History of Silk Silk is one of the most famous materials in the world. It has been used for thousands of years. Silk was first made in China around 2700 BC. According to legend, the Chinese Empress Leizu discovered silk when a cocoon fell into her tea. She noticed that the cocoon was made of a long, soft thread. This thread could be used to make beautiful fabric. For many years, the Chinese kept the secret of silk production. They did not allow anyone to take silkworms or mulberry trees out of China. However, around 200 BC, silk production spread to other countries, such as Korea and Japan. Later, it reached Europe through the Silk Road. Today, silk is still highly valued. It is used to make clothing, scarves, and even furniture. China remains one of the largest producers of silk in the world. Questions: 1. When was silk first made 2. Who discovered silk according to the legend 3. Why did the Chinese keep the secret of silk production 4. How did silk reach Europe 5. What is silk used for today 任务4：阅读理解（短文2） 阅读下面的短文，判断正误（True/False）。 The Story of Jeans Jeans are one of the most popular types of clothing in the world. They were invented by Levi Strauss in the 19th century. Strauss was a German immigrant who moved to the United States. He started a company that made strong pants for workers. These pants were made of denim, a type of cotton fabric. At first, jeans were only worn by workers because they were very durable. However, in the 1950s, jeans became popular with young people. They were seen as a symbol of rebellion and freedom. Today, jeans are worn by people of all ages and backgrounds. They are made in many different styles and colors. Statements: 1. Jeans were invented in the 18th century. 2. Levi Strauss was an American. 3. Jeans were originally made for workers. 4. Jeans became popular with young people in the 1950s. 5. Today, jeans are only worn by young people. 三、拓展应用练习（4c） 任务5：完形填空 阅读下面的短文，选择正确的单词填空。 The Process of Making Paper Paper is an important material in our daily lives. It is used for writing, ... ...
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