Answer:
1- The man, who I talked to yesterday, was very kind. 2- Mr. Noth, whose native language is not English, teaches a class for students. 3- I am using a sentence, which contains an adjective clause. 4- The composition that you wrote, I liked. 5- The man, whose wallet was stolen, called the police. 6- The town where I grew up is small. 7- The summer, during which the weather is the hottest, is the time of year.