（1）What is Chinese silk like？
A.Cheap and soft.
B.Smooth and thin.
C.Strong and colourful.
（2）Who could wear silk at first？
A.Businessmen.
B.Farmers.
C.Rulers.
（3）What wasn't silk used as in Ancient China？
A.Money.
B.Clothing.
C.Umbrellas.
（4）Which city isn't famous for making silk？
A.Shanghai.
B.Suzhou.
C.Nanjing.
（5）How long is the history of making silk in Western countries？
A.More than 1500 years.
B.About 520 years.
C.Less than 800 years.