a Teens help students in remote areas Luo, Chinese university student, only turned 18 in January, but he’s already made a big difference to the lives of many poor young people living in China’s remote（偏远的）areas. His online English lessons have offered them a chance to know a world they could only imagine before. Many have achieved university dreams.

b Luban Lock: magic Chinese puzzle 2,000 years ago, a famous Chinese carpenter named Luban created a magic Chinese puzzle called “Luban Lock”, which he used to test how smart his son was. Watch as Rachel learns to make this Chinese puzzle and tries to solve it! Do you want to have a try?

c First picture of the black hole The first picture of the huge black hole at the heart of the Way was shown on Thursday, thanks to the Thursday, thanks to the efforts of astronomers（天文学家）from around the world, including17 from China. Shen Zhiqiang says that the future purpose of the Event Horizon Telescope（EHT）is to get video pictures of the black hole at the center of the Milky Way.

d China’s healthcare China has made progress in public health over the past years. In 1949, average life expectancy（平均寿命）was 35. It reached nearly 77 in 2019, much higher than the world average of 72. In 1949, there were just 3, 670 medical and health organizations in the whole country. The number increased to nearly 1 million at the end of 2018. Health insurance（保险）has also benefited over 95 percent of the population.

(1). What did Luo do for the young people in the remote areas?

A．	He improved their living conditions.
B．	He gave them online English lessons.
C．	He helped them choose dream universities.

(2). What does Rachel want to know?

A．	How Luban Lock works.
B．	Why Luban created Luban Lock.
C．	Whether Luban’s son was clever.

(3). Who took the first picture of the black hole?

A．	A foreign astronomer team.
B．	A Chinese astronomer team.
C．	An international astronomer team.

(4). Why are the numbers given in Passage d?

A．	To introduce the govermment’s plans.
B．	To show China’s progress in healthcare.
C．	To describe the present situation of China’s healthcare.

(5). What’s the theme of the four passages?

A．

East meets West.

B．

For a better future.

C．

Great Chinese, great China.