Объяснение:
1.- Do you know the woman …who… is talking to the teacher?2.- All he pictures …which…. Picasso painted are very valuable.3.- The flight …that…. my friend took was very slow.4.- I don’t know the name of the student …whose…. grandparents are Italians.5.-She didn’t like the letter ……that…. she received last week.6.-That woman was wearing some strange clothes …which... looked very expensive.7.-The wallet …that…. my son found in the street belonged to Martha.8.-The vegetables …that… you are eating now are from the best supermarket in town.9.-Margaret gave me a big box …that… contained some interesting leaflets.10.-The athlete …who… won the competition was really good and handsome.11.-My uncle bought a house …which…. was built a hundred years ago.12.-Jonathan is a policeman …whose…… son wants to be an astronaut.