假設你是一名高中生，一次—位外國朋友問你，除了在學校學習英語還有什么其他途徑可以練習英語。請你根據提示用英語寫出你參加。英語角”的情況。。。
        提示：
        1．“英語角”于兩年前成立，許多中學生參加，有時也有一些大學生和外國友人來此。
        2．活動時間：每周六上午。
        3．活動內容：練習英語口語，談論大家共同感興趣的事情，交流學習英語的經驗等。
        4．談談你參加此項活動的體會。
        注意：詞數應為100左右。

Which of the following sentences is true according to the passage?

• A、Student participation is not common in the classroom in many courses like society．
  
• B、Some professors want to control the classroom discussion．
  
• C、Some professors usually want the students to take part in the teaching of science and mathematics．
• D、New educational trends have turned up in teaching of natural sciences such as chemistry．

Only then____that she had made a mistake．

• A、she realized
  
• B、did she realize
  
• C、had she realized
  
• D、she had realized