A
For decades, China had wanted a Nobel Prize in science. Tu Youyou, a researcher who helped to develop a malaria（疟疾）medicine, finally won the country that honor.
In fact, Tu is not the only scientist in China who is catching the world’s attention. In 2016, the Nature journal published a list of the top 10 science stars in China. Gao Caixia and Cui Weicheng are two of them.
Gao Caixia has been devoted to genetic engineering for her whole career. She is known for using CRISPR-Cas9, the revolutionary gene-editing technique that is sweeping through biology labs around the world – in crops.
At first, Gao was unwilling to take up gene editing using CRISPR-Cas9 because her lab at the Chinese Academy of Sciences’ Institute of Genetics and Developmental Biology in Beijing had already created mutations（变异）in 82 genes using an older type of technology. But after thinking carefully about it, she decided to give it a try.
After a year of hard work, her lab finally succeeded. Gao worked on genetic engineering in wheat, a crop that is famous for being difficult to work with. Now she is considered one of the best in the world at engineering wheat.
Cui Weicheng is the developer of China’s record-setting Jiaolong submersibl（e 潜水器）. He is now a professor at Westlake University. In 2012, Cui rode inside China’s Jiaolong submersible and reached a depth of more than 7,000 meters in the Pacific.
Thanks to Jiaolong and the 57-year-old developer, China is now one of only a few nations that can explore the deep sea. Jiaolong can travel deeper than any other manned research submersible currently in use, which shows China’s increasing ambition and leadership in deep-sea research.
1. Why is Tu Youyou mentioned at the beginning of the passage?
A. To show one of China’s long-held dreams.
B. To stress the importance of the Nobel Prize.
C. To praise Tu Youyou for her contributions.
D. To introduce more top Chinese scientists.
2. Why did Gao Caixia work on wheat?
A. Because she failed in her attempt to study other crops.
B. Because she was expert at wheat engineering.
C. Because wheat is hard to be genetically engineered
D. Because wheat is the most widely planted crop in China.
3. What is Cui Weicheng’s biggest contribution to China?
A. He teaches about sea at a university.
B. He developed Jiaolong submersible.
C. He is devoted to genetic engineering.
D. He reached the bottom of the ocean.
4. What is the best title for the passage?
A. China’s Science Stars B. China’s Nobel Prize Dream
C. Gao Caixia－China’s Crop Engineer D. Cui Weicheng－China’s Deep Diver
