1. билет в одну сторону - 2. билет до лондона - 3. билет на лондонский поезд - 4. билет туда и обратно стоит 40 фунтов -

I'll buy a colour film and take a lot of pictures if you develop them.

I'll have a party and we can dance to music if you bring chips and drinks.

I'll go camping in the Lake District if you bring bug spray.

Molly'll learn a lot of things if she puts in the effort.

I shan't sit with you at the same desk unless you put deodorant on.

I'll send her a letter as soon as I get more stamps.

If he does his homework every day he will pass his classes.

If he comes in the afternoon we will get dinner together.

If you live in a big city what do you use for transport?

If Milly gives me her address, I will go to her house after school.

If you don't stop talking, the teacher will get angry.

Объяснение:

These sentences are really weird. No one uses shan't and you wouldn't combine a name with "will" as they did with Molly'll.