Unusual, illness, friendship, manager, careless, useful.
1. it's , isn't
2. is , he's
3. she's
4. it's , we
5. are
House forty-second, apartment seventy-ninth
1 I am from Russia
2 The Russian Nation
3 I live in town
4 My great city
5 He said Moscow
6 I live in Pushkin Street
1.She is my best friend.
2.Our students learn different subjects.
3.Russia is the largest country in the world. (of - без понятия куда вставить)
4.We live in the center flat of the city. (a - Тоже лишняя)
5.My son's best friend is fond of reading. (это вообще жесть.... с переводчиком только понял)