As a country strong in math, China has many folk games filled with math wisdom. You may have played many of them before. Let’s take a look at two of them.
 | Luban Lock Luban Lock was first created by Chinese carpenter Lu Ban about 2,000 years ago. It is said that Lu used six wooden pieces to make a toy that looks like a lock for his son. The lock has a lot to do with solid geometry (立体几何). It’s hard to separate the six pieces. However, it is usually easier to unlock a Luban Lock than to put it back together. Now, there are Luban Locks made up of nine or more piece |
 | Huarong Pass Huarong Pass is a traditional Chinese block-moving puzzle. Every block is named after a character in the book Romance of the Three Kingdoms, like Cao Cao, Zhang Fei and Zhao Yun. To succeed in the game, players have to move the blocks to get “Cao Cao” out. This is a test of one’s math knowledge, for example, of geometric area (几何面积). According to the Chinese Puzzle website, it takes at least 81 steps to set “Cao Cao” free. |
Title: Two Ancient Chinese ___54___Toys
Luban Lock | > It was first created by Lu Ban about 2,000 years ago. > Lu Ban used 6 pieces of ___55___to make a lock-like toy for his son. > It uses math knowledge such as solid geometry. > It is ___56___to put the six pieces back together than to unlock it. |
Huarong Pass | > It is made up of a few blocks, and every block has the ___57___of a character in Romance of the Three Kingdoms. > Players win the game by ___58___the blocks to set “Cao Cao” free. > It can test players’ math knowledge like geometric area. |
解析：每空一词，本质是同义句转换
54. Folk，原句China has many folk games filled with math wisdom.
55. wood，原句Lu used six wooden pieces to make a toy
56. harder，原句It is usually easier to unlock a Luban Lock than to put it back together. 57. name，原句Every block is named after a character
58. moving，原句To succeed in the game, players have to move the blocks to get “Cao Cao” out.
