Since 911, coping with terrorism has become one of the most vital tasks for the US.
举一反三
- Tianjin has become one of the most popular tourist cities in China.
- Tourism has become one of the most important _______ of income for the people of that area. (source; sauce)
- Moving forward even in the face of great difficulties has become my most important _____________ in my life since it has helped me accomplish something remarkable.
- The Wandering Earth，_______ Chinese film，has become one of _______ most popular films this year. A: a；不填 B: a；the C: a；a
- A letter of admission to one of the country's selective colleges or universities has become the most soughtafter prize in America.