1)What does grow only in the clean areas?
2)Why does she get bad marks?
3)Who likes to sing old songs?
4)Who always lock the door of the classrom with a key?
5)what does happen every day?
6)what are given in every newspaper?
7)what is your grandfather interested in?
8)who likes all subjects at school?
9)who listen to his boring stories with great intetest?
10)who shakes his head to say "of course"?