A When you read the writings of Confucius，you will see a（1）
constantly
constantly
（constant） recurring word，a Chinese character that represents the heart of Confucian thought：the character ren.What is ren？If you look closely at the（2）
written
written
（write） character，you can understand what it means.The left-hand element of the character represents a person，a human being；the element on the right stands for the number two.The two elements，when joined，indicate（3）
relationships
relationships
（relationship） between individuals，or with all of society.
B An important symbol of China is the Chinese characters-hanzi.While this unique writing system has an ancient origin，it was standardised and unified by Emperor Qinshihuang.Since then，it（4）
has been
has been
（be） one of the great things（5）
binding
binding
（bind） the Chinese people together，and a symbol of Chinese national pride.
Another popular symbol of China around the world is the Great Wall.It was originally built by Emperor Qinshihuang，and（6）
expanded
expanded
（expand） afterwards.The part of the Great Wall most people are familiar with was built by the Ming Dynasty in the 14th century，though.
C China has made significant progress in space exploration（7）
in / during
in / during
the past few years.The country's space program has achieved several milestones，including multiple missions launched by the Chang'e Lunar Exploration Program China has also launched its own space station，the Tiangong，which is expected（8）
to be completed
to be completed
（complete） by 2022 and will be used to conduct long-term experiments in microgravity and host international collaborations.Chinese rocket manufacturers have developed new heavy-lift rockets，（9）
enabling
enabling
（enable） more（10）
ambitious
ambitious
（ambition） missions.Overall，China's achievements demonstrate a strong commitment to advancing its space program and making significant contributions to the global space community.
