阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。The first emperor of China, Qin Shihuang, is remembered for the many things he did during his rule. 【小题1】 221 and 210 B.C., he started the construction of the Great Wall. He built a large network of roads. He introduced 【小题2】 new writing system, currency and set of measurements. The emperor also ordered the construction of a huge army of life-sized terracotta soldiers. These, he hoped, would protect his tomb after 【小题3】(he) death.
Today, the soldiers in Xi’an’s terracotta museum are light brown, but they weren’t always this color. They began as an army of red, blue, yellow, green, white, and purple. 【小题4】(sad), most of the colors did not last to the present day. Before their discovery, the clay soldiers 【小题5】(protect) by being underground. When they were unearthed, however, the air caused the coating under the paint to fall of. The paint disappeared in less time than it takes to boil an egg, 【小题6】(take) with it important pieces of history.
New 【小题7】(technique) are now starting to reveal the army’s true colors. Recently, archaeologists 【小题8】 (discover) an area with more than a hundred soldiers, many of 【小题9】 still have their painted features, including black hair, pink faces, and black or brown eyes. Chinese and German researchers have developed a special liquid 【小题10】(help) preserve the soldiers’ colors. After they find a soldier or other artifact, archaeologists spray it with the liquid. They then cover it in plastic.