题目内容：

Brush, ink, inkstone and paper are known as the Four Treasures of the Scholar’s Studio. 1.

The brush pen was used as early as the seventh or sixth century BC. The holder is usually made of bamboo.  Different from the pen we use today,  the tip of the brush pen is soft and big. 2.The animal hair used is extremely important to the quality of the brush, but the material for the holder is relatively less important.

The brush was used with ink, basically made from pine soot (松烟) or lampblack and glue with many other kinds of additives. 3.A writer then rubs the dry ink stick against an inkstone, a polished and often decorative piece of stone with a shallow bowl carved into one end. Water is added to the shallow bowl, while the writer moves the ink stick in a circular motion (运动) to form dark, liquid ink. 4.

Archaeological (考古学的) evidence shows paper was invented around the first century BC. People used materials such as raw hemp (生麻) and tree bark to produce paper. 5.By the third century, paper was already widely used instead of traditional writing materials such as bamboo slips and silks.

A. It is usually made of wolf, rabbit, or goat hair.

B. Brush pens were used to write and paint as well.

C. Ink is kept as a solid, dry stick until ready for use.

D. In the past, the scholar-official class used these treasures as tools of writing.

E. Since these materials were readily available, paper was inexpensive to produce.

F. So some inkstones with fine decorations can fetch really high prices on the market.

G When a desired blackness of ink is reached, the writer then uses the brush to lift the ink directly from the inkstone.