1
1 The computer's crashed again. I will call someone to come and fix it.
2 The printer isn't printing. We have run out of ink. (остальные варианты не подходят по смыслу)
3 Since you are going shopping tomorrow, can you buy some milk?
4 Don't worry. I've already called Mark; he will come in a few minutes.
5 Don't phone me at around 7. I will be having a meeting.
2
1 By the time you come everyone will have gone home!
2 There's my favourite film on at the cinema. It starts at 8, will you go?
3 By the time we get there the show will have started.
4 You are so slow! When you are through, I will have been waiting for hours!
5 In a week we are celebrating Helen's birthday.
6 Contact me at any time. I am staying at the Royal Hotel.