1 . Directions: Complete the following passage by using the words in the box. Each word can be used only once. Note that there is one word more than you need.

Founding Father of China’s Nuclear Program

Under the terms of the Nuclear Non-Proliferation Tready（不扩散核武器条约）, only five countries are considered to be “nuclear - weapon states.” China is one of them. This military achievement would have been     1     without the contribution of Deng Jiaxian, a leading organizer of China’s nuclear weapon programs.

Deng went to the United States in 1948 for further study, and received a doctorate in physics two years later. Just nine days after graduation, the then 26-year-old returned to the newly - founded People’s Republic of China with     2     physics knowledge. He became a research fellow under the leadership of Qian Sanqiang and started his theoretical nuclear research in cooperation with Yu Min.

From 1958 on, Deng spent over 20 years working     3     with a team of young scientists on the development of China’s first atomic and hydrogen bombs. Originally, they were prepared to receive training by experts from the Soviet Union. Soon after, however, the Soviet government tore up its     4     with China and removed all its experts. Deng had to lead the team of 28 members with an average age of 23 on a mission to     5     the mysterious power   of atomic physics.

There was ridicule（嘲笑）following the     6     of the Soviet experts that China wouldn’t be able to build an atomic bomb within 20 years. Deng said to his colleagues, “It is in the interest of the Chinese people to develop nuclear weapons. We must be willing to be unknown heroes for our lifetime. It is worth the risk of suffering, and it is worth our     7     to this cause.”

As the leader of China’s atomic bomb design, Deng gave lessons himself and organized a team to translate and study the     8     foreign language materials. In the meantime, he never stopped thinking about the direction of atomic bomb development.

Following the successful test of the first atomic bomb in 1964, Deng joined the research group led by Yu Min. They immediately started the design of the hydrogen bomb, which was     9     in 1967. From the first atomic bomb to the first hydrogen bomb, China spent only two years and eight months on development.

Deng passed away in 1986 because of cancer. In the last month of his life, the 28-year secret experience of this great scientist was     10    , and his reputation began to spread throughout China. In 1999, along with 22 other scientists, he was awarded the special prize of “Two Bombs, One Satellite Meritorious Medal” for his contribution to Chinese military science.