4)
1 before, 2 unless, 3 after, 4 as long as, 5 until, 6 as long as, 7 arrive, 8 if it is
5)
1. ... Unless you take them out..
2. ... when the waiter comes over
3. .... when i finish my homework
4. ... as long as you pay
5. The children won't enjoy stronger flavours until they get older
6)
1) will have been closed
2) will be having
3) will have eaten
4) will you be doing
5) will have finished
6) won't be
7) won't have finished