When the first chopsticks were used in China Fifty 1 In many 2 countries. such as China, here chopsticks have been widely used Japan and Korea What materials chopsticksare made of wood. boneor silver Why bamboo and wood chopsticks are common Because the materials can be found 4 One of the table mannersconnected with Never stick your chopsticks straight in your riceThe Introduction of Chopsticks When the first chopsticks were used in China Fifty 1.________ ago Where chopsticks have been widely used In many 2.________ countries, such as China， Japan and Korea What materials chopsticksare made of 3.________， wood, boneor silver Why bamboo and wood chopsticks are common Because the materials can be found 4.________ One of the table mannersconnected with chopsticks Never stick your chopsticks straight in your rice 5.________