Which of the following is the main theme of the passage?

(单选题)It is impractical to universally copy traditional clothing, (单选题)A common cause of boredom in classrooms is when the material (单选题)There is no month in the whole year, ______ nature wears a m (单选题)As regards learning French, I have ______ useful to say sinc (单选题)There is a significant focus on ______ the country will make (单选题)Many organizations have systems by which people can donate u (单选题)Some experts and netizens proposed that English ______ as a (单选题)It is since Jan. 1st, 2021 ______ China has made a sweeping (单选题)There are over 80, 000 restaurants serving Shaxian tradition (单选题)Lu Xun once wrote a couplet: Fierce-browed, I coolly defy th