31. Most of the children in her class are mentally .............. (retard) 32. She continued the ............. until the children realized they has just learned how to app and subtract. (demonstrate ) 33. There was a lot of ................ from for the parents of the disabled children. (oppose) 34. A person who is more beautiful in photographs is said to be ........... ( photographic) 35. The Vang Trang Khuyet Club's members are ............ their photographs for the first time in Hanoi. (exhibition)