1
1 They've just tidied it
2 He's just made some
3 I've just eaten it
4 I've just checked them
5 I've just rung her

2
1 I haven't started it yet
2 I've just seen Andrew
3 He's already done about
4 I haven't finished my plan yet
5 You've already begun
6 We've already spent too long 
7 I haven't done any real work yet
8 I've just realized that
9 I've just decided to

3
1 He hasn't had any fun for a long time.
2 He's had a cold for a week.
3 He hasn't seen his friends for ages.
4 He hasn't done any sport since last year.
5 He's been busy with his studies for months.

4
1 I haven't rung her since the week end.
2 We haven't seen them for five years.
3 We haven't watched one for quite a while.
4 we haven't had one since last summer.
5 We haven't played (it) since our holiday.