4) 1. am
since
2. hasn't seen
for
3. haven't written
phoned
for
4. lives
for
5. have
since
5) They have been in the youth club for three hours.
Joanne and I have been good friends since primary school.
She is playing in the volleyball team for two months.
I should see a doctor. I have been sick for a week.
I haven't heard from Sandra since last October.