专题02 七上M1－5 提升训练-2021年中考英语一轮提升学案及训练题（外研版）

专题02 七上M1－5 2021年九年级中考一轮复习提升训练（外研版） Ⅰ、完形填空 It's hard to believe that a beautiful silk dress comes from thousands of very little worms (虫子)called silkworms! It takes about 5,500 silkworms to make 2.2 pounds of silk. The process (工序) was 1 by the Chinese about 5,000 years ago. 2 is silk made? The process starts with silkworm eggs. The eggs are collected and kept warm. After a few days, silkworms come out of the eggs. They are 3 leaves from mulberry trees every 30 minutes, all night and all day. The room 4 be kept warm, without loud noises or bad smells. After a month, they start to make cocoons (茧). After four days, the cocoons are 5 . The cocoons are heated (加热), and the silkworms are killed inside them. Then the cocoons are put into water to make the silk loose (松散的). The silk 6 three or four cocoons is put together and made into a thread (线). One cocoon can make a thread 1kilometre long! 7 , the silk threads are made into cloth, and the cloth is used for t