11.  It's the first question.

12.  The first question is which one is right between " He is taller than I ."

13.  My first teacher Miss Chen a teacher for me To remember, She taught Chinese .

14.  A few weeks ago in my visit to her, we still talked quite a lot about my first days at school.

15.  She is the person who tought me the first word, she is the person who tought me walk .

16.  The first one is our classmate Li Yun and another shout loudly "come on ,come on!" she runs so fast that other runners fall behind.

17.  The first lesson was English, the teacher taught us some sentences which used usually .

18.  China is one of the first countries in the world to study the science of farming.

19.  at 7:30, we have first lesson.

20.  at 3:00, we have the first lesson in afternoon.