Example : linda got an invitation letter yesterday, got an invitation letter yesterday, didn't she 1.the friends were responsible for the project, ? 2.tomorrow the students will arrange the date and time, ? 3.jim didn't take part in the project, ? 4.there were a lot of students in the hall, ?

1.the friends were responsible for the project,weren't they? 2.tomorrow the students will arrange the date and time,won't they? 3.jim didn't take part in the project,did he? 4.there were a lot of students in the hall,weren't there?