21.  From the professor's facial expression, I could see his appreciation on her.

22.  I have done the same thing when I see someone coming to our class.

23.  I can see many students read books in the library on the weekends and many students write homework or review lessons in the classrooms after school.

24.  As you see it's common in my campus to see students hurry to attend lessons.

25.  Besides, what I see here precisely convinces my opinion, doesn't it?

26.  However, our dreams broke ruthlessly at the first sight we saw them.

27.  Every time, seeing the sweat wetting his white linen shirt and his brilliant smile, I felt a bit guilty.

28.  Every time, seeing the sweat wetting his white linen shirt and his brilliant smile, I felt a bit guilty.

29.  Every time, seeing the sweat wet his white linen shirt and brilliant smile blossom on his face, I felt a bit guilty.

30.  Every time, seeing the sweat wet his white linen shirt and brilliant smile blossom on his face, I felt a bit guilty.