When I get there, before you leave, etc (A-B) Mark and Sarah are continuing the conversation in 27A. Put in the verbs. Use will or the present simple. Sarah: If (►) you take (you / take) a train, (►)it'll be (it / be) much more comfortable.
If (1) ................................ (you / need) a car, you can hire one when (2)………………………………..(you / get) to Glasgow.
Mark: If (3)…………………………….. (I / hire) a car, (4)…………………………….. (it / be) too complicated. I'd rather take my own. Sarah: It's too dangerous. You might fall asleep on the motorway.
Mark: I won't fall asleep. I can play loud music. Anyway, (5)……………………………… (I / get) there much quicker when (6).......... ………………….. (there / be) no traffic on the road. As soon as (7)……………………… (I / arrive), (8)…………………………………. (I / ring) you, I promise.
Sarah: (9)…………………………….. (I / be) worried until (10)…………………………… (I/hear) from you. But don't ring before (11)…………………………….. (I / be) awake in the morning.
Mark: (12)…………………………(I / lie) down for a couple of hours before (13)……………………………….(I/go).
Sarah: Good idea. (14)……………………………… (you / be) exhausted tomorrow if (15)………………………(you / not / get) some sleep this evening.

If you need a car, you can hire one when you get to Glasgow. Mark: If I hire a car, it will be too complicated. I'd rather take my own. Sarah: It's too dangerous. You might fall asleep on the motorway. Mark: I won't fall asleep. I can play loud music. Anyway, I will get there much quicker when there is no traffic on the road. As soon as I arrive, I will ring you, I promise. Sarah: I will be worried until I hear from you. But don't ring before I am awake in the morning. Mark: I will lie down for a couple of hours before I go. Sarah: Good idea. You will be exhausted tomorrow if you don't get some sleep this evening.