介词+关系代词

介词+关系代词
He bought a beautifully printed book___ ___there are mang nice picture . The age ___ ___children can go to school is seven. The bike___ ___he went to school every day was stolen last night. She had saved money,___ ___she bought a nice computer. That worker made a serious mistake,___ ___he was forced to leave his factory. In the factory there is a transformer___ ___is painted the world "danger". This is the official___ ___we've got the news we need most. Is this the camera___ ___he took these photographs? Do you know the lady___ ___Mrs Evans went to the party last night? Is there a shop___ ___we can buy an English dictionary?