21.  Diligent Students\

22.  Before playing the Guqin, He always changed his clothes and washed his hands , showing his respect for ancient and culture.

23.  Before playing the Guqin, He always changed his clothes and washed his hands , showing his respect for ancient and culture.

24.  Before playing the Guqin, He always changed his clothes and washed his hands , showing his respect for ancient and culture.

25.  Before playing the Guqin, He always changed his clothes and washed his hands , showing his respect for ancient and culture.

26.  Before you start the procedure, don't forget to have a photo taken with the flag of DII to mark this special day.

27.  I guess it was normal for a beautiful girl to get a boy friend early, even before entering the university.

28.  And forming that kind of expectations or impression before we really know someone can bring impacts on our school life.

29.  Before we went to the restaurant, our leader promised to pay for it.

30.  I could still remember his confident expression before and during the dinner.