Задание 4.
1) in, 2) in, 3) to, 4) at, 5) on
Задание 5.
1) Are you....
2) Are...
are not
3) ...is... is...
4) is
5) Am
Задание 6.
1) My pen is bad. Send me a pen, please
2) Is Minsk a big city? - Yes, it is
3) Are you a teacher? - No, I'm not a teacher, I'm a student.
4) Please take the cups off the table.
5) The fifth note long or short?