The caterpillar makes its cocoons using these strands. The threads on the outside of the cocoon are rough, while those inside are soft and smooth.
Some fully-spun cocoons are heated. This kills the pupa inside. The cocoons are then put into hot water to loosen the fine threads. Finally, these threads are reeled off the cocoons.
The length of unbroken thread produced by a single cocoon measures about one-and-a-half kilometers. Being twisted together several of these threads make single woven materials.
1. What is the purpose of the text ……..
A. To persuade readers to buy silk.
B. To put silk into different categories.
C. To entertain readers with the knowledge.
D. To present some points of view about silk.
E. To describe how silk comes into existence.
2. How are the threads on the outside of the cocoon ……..
3. What are mulberry leaves for ……..
B. Spinning cocoons.
C. Storing threads.
D. Hatching eggs.
E. Laying eggs.