It is 2025 now. Yang Chen-Ning, one of the greatest physicists (物理学家) of the 20th century, passed away recently. He lived a remarkable life, full of achievements and contributions to both science and China.

Yang was born in 1922 in Hefei, China. He grew up during a difficult time in Chinese history, but his talent for learning was clear from a young age. He first studied at Tsinghua University in Beijing and later went to the United States for further education. There, he earned his PhD from the University of Chicago in 1948.

In 1957, while still in his thirties, Yang made history. Together with another Chinese scientist, Tsung-Dao Lee, he won the Nobel Prize in Physics. Their discovery changed how scientists understand the basic laws of the universe. This made them the first Chinese Nobel laureates.

Yang spent many years teaching and doing research in the United States. He became a famous professor at the State University of New York and made further important contributions to physics. Yet, he never forgot his roots. In his later years, Yang returned to Tsinghua University in Beijing. He devoted his energy to helping China develop its scientific research and education systems.

Throughout his life, Yang received many honors. His long journey — from a student in China to a world-leading physicist — continues to inspire young people to learn, explore, and serve their country.

1.1. How old was Yang Chen-Ning when he passed away?

A 95 years old.

B 98 years old.

C 103 years old.

D 105 years old.

解析：选C。C 数字计算题。C 数字计算题。根据首段的“It is 2025 now”及第二段的“Yang was born in 1922”可知，其享年为2025 - 1922 = 103岁。故选C。故选C。

2.2. In which country did Yang Chen-Ning get his PhD?

A China.

B The US.

C The UK.

D Japan.

解析：选B。B 细节理解题。根据第二段中的“later went to the United States for further education. There, he earned his PhD from the University of Chicago in 1948”可知，杨振宁在美国芝加哥大学获得博士学位。故选B。

3.3. Why was 1957 an important year for Yang Chen-Ning?

A He won the Nobel Prize.

B He was born that year.

C He returned to China.

D He became a professor.

解析：选A。A 细节理解题。根据第三段中的“In 1957... Together with another Chinese scientist, Tsung-Dao Lee, he won the Nobel Prize in Physics” 可知，在1957年他获得诺贝尔物理学奖，因此这一年对他来说具有重大意义。故选A。

4.4. What did Yang Chen-Ning do after returning to China?

A He stopped doing research.

B He helped China’s science and education.

C He taught only American students.

D He focused on his own health.

解析：选B。B 细节理解题。根据第四段中的“In his later years, Yang returned to Tsinghua University... He devoted his energy to helping China develop its scientific research and education systems”可知，他回国后助力中国科技和教育发展。故选B。

5.5. What is the main purpose of this article?

A To explain a physics theory.

B To compare different scientists.

C To discuss Nobel Prize history.

D To introduce a great scientist’s life.

解析：选D。D推理判断题。全文按照时间顺序介绍了杨振宁的生平事迹、科学成就和对祖国的贡献，因此本文的主要目的是介绍这位伟大科学家的一生。故选D。